Island Park Reservoir fishing

Island Park Reservoir fishing is stocked with Kokanee Salmon, Rainbow Trout, Coho Salmon, Cutbow, Cutthroat Trout, Splake, and 1 more on a reservoir. Also recorded: Brook Trout, Mountain Whitefish, Utah Chub, Utah Sucker, Largescale Sucker, and Yellow Perch. It is stocked about 11 times a year since 1968, most often in June and September. Species guides list dawn and dusk for Kokanee Salmon and Rainbow Trout and dawn, day, and dusk for Brook Trout and Yellow Perch.

Island Park Reservoir
Photo: U.S. Bureau of Reclamation, Public domain
Last stocked
October 22, 2026
· Rainbow Trout
Plants on record
651
Since 1968
Species stocked
7 (+6 also recorded)
Average size
4.2 in
Surface acres
7,281.3
Elevation
6,306 ft

Fish at Island Park Reservoir

7 stocked · 6 confirmed present

Rainbow Trout Stocked · 444 plants · last May 20, 2026 Best: dawn, dusk

Last stocked May 20, 2026 · avg 4.9 in · 444 plants

Best: dawn, dusk

Rainbow Trout species guide
Cutbow Stocked · 68 plants · last August 25, 1997

Last stocked August 25, 1997 · avg 3.5 in · 68 plants

Cutbow species guide
Coho Salmon Stocked · 62 plants · last June 12, 1989

Last stocked June 12, 1989 · avg 3.5 in · 62 plants

Coho Salmon species guide
Kokanee Salmon Stocked · 55 plants · last June 22, 2022 Best: dawn, dusk

Last stocked June 22, 2022 · avg 3.1 in · 55 plants

Best: dawn, dusk

Kokanee Salmon species guide
Cutthroat Trout Stocked · 15 plants · last September 27, 2013

Last stocked September 27, 2013 · avg 3.3 in · 15 plants

Cutthroat Trout species guide
Splake Stocked · 4 plants · last May 12, 1999

Last stocked May 12, 1999 · avg 4.5 in · 4 plants

Splake species guide
Steelhead Stocked · 2 plants · last June 25, 2009

Last stocked June 25, 2009 · 2 plants

Steelhead species guide

Fishing is best from a boat in the summer, while bank fishing can be quite good in the fall and spring. In the winter, anglers often ice fish for kokanee and rainbow trout near the dam. Anglers also cast for cutthroat and brook trout in the reservoir. (idfg.idaho.gov, accessed September 22, 2026)(recreation.gov, accessed September 22, 2026)

Drafted by AI from the cited sources and checked before publishing.

How Island Park Reservoir is stocked

Source: Idaho Department of Fish and Game.

No plants recorded in 1977.

Fish stocked in 1968

1,204,645

Fish stocked in 1969

774,200

Fish stocked in 1970

613,370

Fish stocked in 1971

972,228

Fish stocked in 1972

1,655,815

Fish stocked in 1973

1,490,036

Fish stocked in 1974

326,940

Fish stocked in 1975

1,037,182

Fish stocked in 1976

841,710

Fish stocked in 1978

50,475

Fish stocked in 1979

172,375

Fish stocked in 1980

1,039,613

Fish stocked in 1981

975,003

Fish stocked in 1982

1,456,786

Fish stocked in 1983

849,518

Fish stocked in 1984

598,685

Fish stocked in 1985

2,399,106

Fish stocked in 1986

1,095,638

Fish stocked in 1987

1,565,584

Fish stocked in 1988

1,387,587

Fish stocked in 1989

1,815,214

Fish stocked in 1990

2,359,013

Fish stocked in 1991

1,375,478

Fish stocked in 1992

1,720,499

Fish stocked in 1993

583,924

Fish stocked in 1994

2,683,169

Fish stocked in 1995

2,046,722

Fish stocked in 1996

1,741,419

Fish stocked in 1997

2,280,382

Fish stocked in 1998

625,833

Fish stocked in 1999

507,650

Fish stocked in 2000

603,541

Fish stocked in 2001

961,042

Fish stocked in 2002

755,623

Fish stocked in 2003

348,750

Fish stocked in 2004

559,501

Fish stocked in 2005

573,295

Fish stocked in 2006

757,975

Fish stocked in 2007

1,402,308

Fish stocked in 2008

1,263,624

Fish stocked in 2009

971,700

Fish stocked in 2010

409,050

Fish stocked in 2011

386,695

Fish stocked in 2012

593,326

Fish stocked in 2013

653,298

Fish stocked in 2014

476,852

Fish stocked in 2015

380,008

Fish stocked in 2016

407,421

Fish stocked in 2017

393,049

Fish stocked in 2018

141,024

Fish stocked in 2019

384,056

Fish stocked in 2020

130,530

Fish stocked in 2021

189,299

Fish stocked in 2022

133,289

Fish stocked in 2023

34,875

Fish stocked in 2024

35,682

Fish stocked in 2025

29,084

Fish stocked in 2026

18,720

Stocking history

Source: Idaho Department of Fish and Game.
Date Species Quantity Avg. length Source
October 22, 2026Rainbow Trout10,51413 inreport
May 20, 2026Rainbow Trout18,72013 inreport
September 30, 2025Rainbow Trout5,36313 inreport
September 26, 2025Rainbow Trout5,14813 inreport
June 18, 2025Rainbow Trout10,60513 inreport
May 13, 2025Rainbow Trout7,96813 inreport
October 2, 2024Rainbow Trout13,27013 inreport
June 24, 2024Rainbow Trout9,18013 inreport
June 18, 2024Rainbow Trout3,60013 inreport
May 30, 2024Rainbow Trout9,63213 inreport
October 4, 2023Rainbow Trout13,27513 inreport
June 14, 2023Rainbow Trout12,00013 inreport
June 12, 2023Rainbow Trout9,60013 inreport
September 28, 2022Rainbow Trout11,82213 inreport
June 22, 2022Kokanee Salmon99,7501.5 inreport
June 1, 2022Rainbow Trout9,75913 inreport
May 16, 2022Rainbow Trout11,95813 inreport
October 6, 2021Rainbow Trout13,52413 inreport
June 23, 2021Rainbow Trout12,72013 inreport
June 3, 2021Kokanee Salmon153,4501.5 inreport
May 27, 2021Rainbow Trout9,60513 inreport
September 15, 2020Rainbow Trout107,8224.5 inreport
June 8, 2020Rainbow Trout12,00113 inreport
May 21, 2020Rainbow Trout10,70713 inreport
October 16, 2019Rainbow Trout655–report
October 16, 2019Rainbow Trout39313 inreport
September 10, 2019Rainbow Trout106,555–report
June 25, 2019Rainbow Trout10,23013 inreport
June 4, 2019Kokanee Salmon250,1774.5 inreport
May 16, 2019Rainbow Trout16,046–report
September 19, 2018Rainbow Trout46,5054.5 inreport
September 18, 2018Rainbow Trout62,8804.5 inreport
September 17, 2018Rainbow Trout9,996–report
June 25, 2018Rainbow Trout12,00013 inreport
May 29, 2018Rainbow Trout400–report
May 29, 2018Rainbow Trout9,24313 inreport
September 12, 2017Rainbow Trout119,4734.5 inreport
June 28, 2017Rainbow Trout12,367–report
June 6, 2017Kokanee Salmon250,3494.5 inreport
June 2, 2017Rainbow Trout10,860–report
September 20, 2016Rainbow Trout132,384–report
July 19, 2016Rainbow Trout12,000–report
June 22, 2016Rainbow Trout797–report
June 1, 2016Rainbow Trout9,900–report
June 1, 2016Kokanee Salmon252,3401.5 inreport
September 10, 2015Rainbow Trout4,004–report
September 10, 2015Rainbow Trout108,0544.5 inreport
August 10, 2015Rainbow Trout3,596–report
July 1, 2015Rainbow Trout250–report
July 1, 2015Rainbow Trout5,751–report
June 9, 2015Kokanee Salmon248,7044.5 inreport
May 12, 2015Rainbow Trout9,649–report
October 28, 2014Rainbow Trout400–report
September 17, 2014Rainbow Trout49,5004.5 inreport
September 16, 2014Rainbow Trout6,174–report
September 16, 2014Rainbow Trout61,6004.5 inreport
August 20, 2014Rainbow Trout6,048–report
June 20, 2014Rainbow Trout400–report
June 19, 2014Rainbow Trout11,292–report
June 3, 2014Rainbow Trout4,080–report
June 3, 2014Rainbow Trout78,8584.5 inreport
June 3, 2014Kokanee Salmon258,5001.5 inreport
October 23, 2013Rainbow Trout795–report
October 17, 2013Rainbow Trout94,8464.5 inreport
September 27, 2013Cutthroat Trout164,8351.5 inreport
September 12, 2013Rainbow Trout9,030–report
September 12, 2013Rainbow Trout108,0001.5 inreport
September 11, 2013Rainbow Trout12,600–report
July 23, 2013Rainbow Trout600–report
July 23, 2013Rainbow Trout11,792–report
May 29, 2013Kokanee Salmon250,8001.5 inreport
October 17, 2012Rainbow Trout16,800–report
October 2, 2012Rainbow Trout200–report
October 2, 2012Rainbow Trout22,080–report
September 28, 2012Cutthroat Trout287,0001.5 inreport
September 7, 2012Rainbow Trout36,5204.5 inreport
September 6, 2012Rainbow Trout79,6804.5 inreport
June 1, 2012Rainbow Trout15,386–report
May 31, 2012Kokanee Salmon120,3601.5 inreport
May 22, 2012Rainbow Trout15,300–report
September 21, 2011Rainbow Trout400–report
September 13, 2011Rainbow Trout81,2504.5 inreport
September 12, 2011Rainbow Trout87,5004.5 inreport
September 8, 2011Rainbow Trout7,600–report
June 29, 2011Rainbow Trout17,050–report
June 16, 2011Kokanee Salmon54,5304.5 inreport
June 15, 2011Rainbow Trout600–report
June 14, 2011Rainbow Trout17,923–report
June 7, 2011Kokanee Salmon119,8421.5 inreport
September 27, 2010Rainbow Trout11,360–report
September 15, 2010Rainbow Trout74,1004.5 inreport
September 14, 2010Rainbow Trout76,8004.5 inreport
June 2, 2010Kokanee Salmon217,1504.5 inreport
June 1, 2010Rainbow Trout15,080–report
May 10, 2010Rainbow Trout14,560–report
September 15, 2009Rainbow Trout6,900–report
June 25, 2009Steelhead21,000–report
May 28, 2009Steelhead10,800–report
May 7, 2009Rainbow Trout933,0001.5 inreport
October 29, 2008Rainbow Trout14,700–report
July 9, 2008Rainbow Trout414,0001.5 inreport
July 8, 2008Rainbow Trout378,0001.5 inreport
June 12, 2008Rainbow Trout160,2244.5 inreport
June 12, 2008Rainbow Trout39,3954.5 inreport
June 3, 2008Rainbow Trout16,800–report
June 2, 2008Rainbow Trout17,465–report
May 28, 2008Kokanee Salmon223,0401.5 inreport
September 18, 2007Rainbow Trout4,030–report
July 12, 2007Rainbow Trout164,3604.5 inreport
July 11, 2007Rainbow Trout287,6304.5 inreport
June 25, 2007Rainbow Trout20,608–report
June 4, 2007Rainbow Trout20,540–report
May 30, 2007Rainbow Trout73,4404.5 inreport
May 30, 2007Kokanee Salmon491,7204.5 inreport
May 29, 2007Rainbow Trout210,9404.5 inreport
May 9, 2007Kokanee Salmon63,2004.5 inreport
May 8, 2007Kokanee Salmon65,8404.5 inreport
September 11, 2006Rainbow Trout78,8001.5 inreport
September 11, 2006Rainbow Trout9,120–report
June 22, 2006Rainbow Trout9,180–report
June 7, 2006Rainbow Trout110,6004.5 inreport
June 6, 2006Rainbow Trout105,8004.5 inreport
June 6, 2006Kokanee Salmon106,9754.5 inreport
May 23, 2006Kokanee Salmon311,6004.5 inreport
May 15, 2006Rainbow Trout25,900–report
September 22, 2005Rainbow Trout10,790–report
June 15, 2005Rainbow Trout98,0004.5 inreport
June 15, 2005Rainbow Trout8,400–report
June 2, 2005Kokanee Salmon248,0001.5 inreport
May 20, 2005Rainbow Trout186,6154.5 inreport
May 19, 2005Rainbow Trout21,490–report
September 2, 2004Rainbow Trout64,9001.5 inreport
September 2, 2004Rainbow Trout48,0004.5 inreport
September 2, 2004Rainbow Trout10,500–report
June 14, 2004Rainbow Trout10,240–report
June 2, 2004Rainbow Trout202,5664.5 inreport
June 2, 2004Kokanee Salmon66,6001.5 inreport
June 2, 2004Kokanee Salmon137,0954.5 inreport
May 24, 2004Rainbow Trout19,600–report
October 9, 2003Rainbow Trout80,2004.5 inreport
September 19, 2003Rainbow Trout34,650–report
July 1, 2003Rainbow Trout17,630–report
June 10, 2003Cutthroat Trout7,560–report
June 9, 2003Rainbow Trout18,910–report
June 5, 2003Kokanee Salmon30,0004.5 inreport
May 12, 2003Rainbow Trout159,8004.5 inreport
October 22, 2002Rainbow Trout62,4004.5 inreport
October 22, 2002Rainbow Trout8,000–report
October 21, 2002Rainbow Trout12,600–report
September 17, 2002Rainbow Trout10,400–report
September 16, 2002Rainbow Trout15,1254.5 inreport
September 16, 2002Rainbow Trout10,000–report
September 11, 2002Rainbow Trout211,4301.5 inreport
June 25, 2002Rainbow Trout6,900–report
June 5, 2002Kokanee Salmon37,3801.5 inreport
June 4, 2002Kokanee Salmon365,2681.5 inreport
May 30, 2002Rainbow Trout16,120–report
September 13, 2001Rainbow Trout246,9324.5 inreport
September 7, 2001Rainbow Trout63,1604.5 inreport
September 5, 2001Rainbow Trout10,000–report
August 31, 2001Rainbow Trout74,3304.5 inreport
August 30, 2001Rainbow Trout68,1104.5 inreport
June 25, 2001Rainbow Trout8,750–report
June 11, 2001Rainbow Trout15,120–report
May 16, 2001Kokanee Salmon474,6404.5 inreport
September 13, 2000Rainbow Trout3,075–report
September 13, 2000Rainbow Trout286,9004.5 inreport
September 12, 2000Rainbow Trout2,296–report
September 8, 2000Rainbow Trout2,210–report
September 8, 2000Rainbow Trout151,3504.5 inreport
September 7, 2000Rainbow Trout2,430–report
September 7, 2000Rainbow Trout131,7004.5 inreport
July 5, 2000Rainbow Trout10,080–report
June 22, 2000Rainbow Trout13,500–report
October 20, 1999Cutthroat Trout11,2004.5 inreport
September 21, 1999Rainbow Trout2,380–report
September 17, 1999Rainbow Trout103,2904.5 inreport
September 14, 1999Rainbow Trout175,9254.5 inreport
September 9, 1999Rainbow Trout2,472–report
September 2, 1999Rainbow Trout2,400–report
September 1, 1999Rainbow Trout2,400–report
August 31, 1999Rainbow Trout2,400–report
July 12, 1999Rainbow Trout9,990–report
July 9, 1999Rainbow Trout65,1754.5 inreport
July 7, 1999Rainbow Trout65,1754.5 inreport
June 23, 1999Rainbow Trout13,475–report
May 30, 1999Kokanee Salmon41,6004.5 inreport
May 12, 1999Splake9,768–report
October 15, 1998Rainbow Trout2,250–report
September 22, 1998Rainbow Trout3,224–report
September 14, 1998Rainbow Trout86,2504.5 inreport
September 11, 1998Rainbow Trout180,0004.5 inreport
September 3, 1998Rainbow Trout2,385–report
September 2, 1998Rainbow Trout2,430–report
September 1, 1998Rainbow Trout2,990–report
June 26, 1998Rainbow Trout19,040–report
June 19, 1998Kokanee Salmon125,3041.5 inreport
June 11, 1998Rainbow Trout71,1104.5 inreport
June 3, 1998Splake13,500–report
May 27, 1998Rainbow Trout117,3504.5 inreport
September 9, 1997Rainbow Trout11,600–report
August 25, 1997Cutbow125,4001.5 inreport
August 25, 1997Cutbow125,4001.5 inreport
August 22, 1997Cutbow440,0001.5 inreport
August 22, 1997Cutbow440,0001.5 inreport
July 31, 1997Cutbow135,0001.5 inreport
July 31, 1997Cutbow135,0001.5 inreport
July 7, 1997Rainbow Trout15,0154.5 inreport
June 12, 1997Rainbow Trout58,8784.5 inreport
June 10, 1997Rainbow Trout174,1204.5 inreport
May 28, 1997Kokanee Salmon121,2001.5 inreport
May 28, 1997Kokanee Salmon433,1154.5 inreport
May 19, 1997Rainbow Trout45,7804.5 inreport
May 19, 1997Rainbow Trout19,874–report
September 27, 1996Cutbow96,0001.5 inreport
September 27, 1996Cutbow96,0001.5 inreport
September 23, 1996Cutbow508,5321.5 inreport
September 23, 1996Cutbow508,5321.5 inreport
September 17, 1996Kokanee Salmon5,0004.5 inreport
September 10, 1996Cutthroat Trout56,0004.5 inreport
September 5, 1996Rainbow Trout10,000–report
June 28, 1996Splake4,810–report
June 24, 1996Rainbow Trout18,000–report
June 20, 1996Rainbow Trout23,100–report
June 19, 1996Rainbow Trout150,4704.5 inreport
May 31, 1996Rainbow Trout264,9754.5 inreport
October 13, 1995Rainbow Trout2,800–report
October 12, 1995Rainbow Trout2,000–report
October 4, 1995Splake42,0004.5 inreport
September 25, 1995Cutthroat Trout50,0324.5 inreport
September 18, 1995Cutbow130,5004.5 inreport
September 18, 1995Cutbow130,5004.5 inreport
September 14, 1995Cutbow99,6004.5 inreport
September 14, 1995Cutbow99,6004.5 inreport
September 13, 1995Cutbow352,2104.5 inreport
September 13, 1995Cutbow352,2104.5 inreport
August 22, 1995Rainbow Trout8,640–report
July 13, 1995Rainbow Trout28,150–report
June 19, 1995Rainbow Trout112,7504.5 inreport
June 19, 1995Rainbow Trout12,000–report
June 13, 1995Rainbow Trout123,7304.5 inreport
June 13, 1995Kokanee Salmon248,2004.5 inreport
June 7, 1995Kokanee Salmon59,5004.5 inreport
May 30, 1995Kokanee Salmon59,5004.5 inreport
May 24, 1995Kokanee Salmon66,4004.5 inreport
May 15, 1995Kokanee Salmon66,4004.5 inreport
November 2, 1994Rainbow Trout117,3664.5 inreport
October 27, 1994Rainbow Trout5,8004.5 inreport
October 26, 1994Rainbow Trout5,0004.5 inreport
October 20, 1994Cutbow108,5004.5 inreport
October 20, 1994Cutbow108,5004.5 inreport
October 19, 1994Cutbow49,6004.5 inreport
October 19, 1994Cutbow49,6004.5 inreport
October 18, 1994Cutbow49,6004.5 inreport
October 18, 1994Cutbow49,6004.5 inreport
October 17, 1994Cutbow52,7004.5 inreport
October 17, 1994Cutbow52,7004.5 inreport
October 14, 1994Cutbow49,6004.5 inreport
October 14, 1994Cutbow49,6004.5 inreport
October 13, 1994Cutbow49,6004.5 inreport
October 13, 1994Cutbow49,6004.5 inreport
October 12, 1994Cutbow189,1004.5 inreport
October 12, 1994Cutbow189,1004.5 inreport
October 11, 1994Cutbow43,4004.5 inreport
October 11, 1994Cutbow43,4004.5 inreport
October 4, 1994Rainbow Trout10,005–report
October 4, 1994Rainbow Trout14,982–report
September 29, 1994Rainbow Trout3,721–report
September 28, 1994Rainbow Trout3,530–report
September 27, 1994Rainbow Trout57,9151.5 inreport
September 27, 1994Cutthroat Trout145,8254.5 inreport
July 7, 1994Rainbow Trout20,100–report
June 28, 1994Rainbow Trout175,3504.5 inreport
June 14, 1994Rainbow Trout20,000–report
June 13, 1994Rainbow Trout172,8624.5 inreport
June 3, 1994Rainbow Trout130,2434.5 inreport
June 3, 1994Kokanee Salmon133,2504.5 inreport
June 2, 1994Kokanee Salmon247,0004.5 inreport
May 24, 1994Kokanee Salmon72,0004.5 inreport
May 23, 1994Kokanee Salmon72,0004.5 inreport
May 18, 1994Rainbow Trout20,020–report
May 17, 1994Kokanee Salmon72,0004.5 inreport
October 28, 1993Rainbow Trout10,000–report
October 14, 1993Cutthroat Trout55,0664.5 inreport
October 12, 1993Rainbow Trout85,6804.5 inreport
July 7, 1993Kokanee Salmon200,6241.5 inreport
July 1, 1993Rainbow Trout5,9324.5 inreport
July 1, 1993Rainbow Trout150–report
June 22, 1993Rainbow Trout15,600–report
June 10, 1993Rainbow Trout200,2501.5 inreport
May 28, 1993Rainbow Trout10,000–report
February 11, 1993Rainbow Trout622–report
November 16, 1992Kokanee Salmon3,4704.5 inreport
November 6, 1992Cutbow157,9504.5 inreport
November 6, 1992Cutbow157,9504.5 inreport
November 5, 1992Cutbow305,0004.5 inreport
November 5, 1992Cutbow305,0004.5 inreport
November 4, 1992Cutthroat Trout166,2624.5 inreport
November 2, 1992Rainbow Trout31,584–report
October 29, 1992Rainbow Trout30,7694.5 inreport
October 29, 1992Rainbow Trout12,960–report
October 27, 1992Rainbow Trout31,350–report
June 2, 1992Kokanee Salmon138,6721.5 inreport
May 20, 1992Rainbow Trout19,772–report
May 13, 1992Rainbow Trout359,7604.5 inreport
November 15, 1991Cutthroat Trout50,7004.5 inreport
November 8, 1991Rainbow Trout27,6854.5 inreport
October 9, 1991Cutbow60,6001.5 inreport
October 9, 1991Cutbow66,5004.5 inreport
October 9, 1991Cutbow60,6001.5 inreport
October 9, 1991Cutbow66,5004.5 inreport
September 17, 1991Rainbow Trout100,2154.5 inreport
September 5, 1991Cutbow270,0004.5 inreport
September 5, 1991Cutbow270,0004.5 inreport
September 3, 1991Rainbow Trout10,000–report
August 1, 1991Rainbow Trout6,3634.5 inreport
July 30, 1991Rainbow Trout139,8004.5 inreport
July 23, 1991Rainbow Trout49,9404.5 inreport
July 15, 1991Rainbow Trout26,3504.5 inreport
July 8, 1991Rainbow Trout30,2004.5 inreport
July 2, 1991Rainbow Trout35,2804.5 inreport
June 13, 1991Kokanee Salmon65,2801.5 inreport
June 13, 1991Kokanee Salmon39,4654.5 inreport
October 29, 1990Cutbow37,5004.5 inreport
October 29, 1990Cutbow37,5004.5 inreport
October 26, 1990Cutbow77,5004.5 inreport
October 26, 1990Cutbow77,5004.5 inreport
October 1, 1990Rainbow Trout99,7604.5 inreport
September 26, 1990Cutbow42,6001.5 inreport
September 26, 1990Cutbow300,5704.5 inreport
September 26, 1990Cutbow42,6001.5 inreport
September 26, 1990Cutbow300,5704.5 inreport
September 14, 1990Rainbow Trout575–report
September 13, 1990Rainbow Trout17,976–report
September 5, 1990Rainbow Trout20,160–report
August 6, 1990Rainbow Trout16,104–report
July 9, 1990Rainbow Trout515,9101.5 inreport
June 28, 1990Rainbow Trout20,130–report
June 25, 1990Rainbow Trout52,0004.5 inreport
June 18, 1990Rainbow Trout23,900–report
June 8, 1990Kokanee Salmon27,0004.5 inreport
May 31, 1990Rainbow Trout3,5994.5 inreport
May 30, 1990Kokanee Salmon101,5201.5 inreport
May 29, 1990Kokanee Salmon60,4801.5 inreport
May 18, 1990Rainbow Trout47,2504.5 inreport
May 17, 1990Rainbow Trout175,0004.5 inreport
May 15, 1990Rainbow Trout88,0204.5 inreport
May 14, 1990Rainbow Trout88,2004.5 inreport
May 11, 1990Rainbow Trout47,9144.5 inreport
May 10, 1990Rainbow Trout37,1754.5 inreport
December 14, 1989Rainbow Trout6,000–report
November 9, 1989Cutbow30,0004.5 inreport
November 9, 1989Cutbow30,0004.5 inreport
November 8, 1989Cutbow25,6004.5 inreport
November 8, 1989Cutbow25,6004.5 inreport
October 18, 1989Rainbow Trout6,000–report
October 11, 1989Rainbow Trout138,4714.5 inreport
October 11, 1989Cutthroat Trout47,0004.5 inreport
October 10, 1989Rainbow Trout183,0724.5 inreport
September 20, 1989Cutbow44,5004.5 inreport
September 20, 1989Cutbow44,5004.5 inreport
September 19, 1989Cutbow160,2004.5 inreport
September 19, 1989Cutbow160,2004.5 inreport
September 6, 1989Cutbow133,5004.5 inreport
September 6, 1989Cutbow133,5004.5 inreport
June 28, 1989Rainbow Trout35,438–report
June 12, 1989Coho Salmon102,0004.5 inreport
May 17, 1989Rainbow Trout233,4831.5 inreport
May 17, 1989Rainbow Trout276,1504.5 inreport
November 3, 1988Rainbow Trout130,6264.5 inreport
October 5, 1988Rainbow Trout20,460–report
September 19, 1988Rainbow Trout10,000–report
July 5, 1988Rainbow Trout111,8124.5 inreport
June 29, 1988Rainbow Trout30,1024.5 inreport
June 28, 1988Rainbow Trout20,230–report
June 24, 1988Rainbow Trout23,1844.5 inreport
June 16, 1988Coho Salmon126,0004.5 inreport
June 15, 1988Coho Salmon264,6004.5 inreport
June 14, 1988Coho Salmon126,0004.5 inreport
June 2, 1988Rainbow Trout38,1734.5 inreport
May 23, 1988Rainbow Trout88,6504.5 inreport
May 12, 1988Rainbow Trout242,9504.5 inreport
May 11, 1988Rainbow Trout154,8004.5 inreport
September 16, 1987Rainbow Trout13,300–report
August 5, 1987Rainbow Trout15,925–report
July 27, 1987Rainbow Trout21,0004.5 inreport
July 14, 1987Rainbow Trout25,200–report
July 13, 1987Rainbow Trout22,5094.5 inreport
June 17, 1987Rainbow Trout536,3551.5 inreport
June 11, 1987Coho Salmon36,0004.5 inreport
June 8, 1987Coho Salmon192,0004.5 inreport
May 27, 1987Rainbow Trout24,325–report
May 27, 1987Coho Salmon280,0004.5 inreport
May 21, 1987Rainbow Trout110,4004.5 inreport
May 20, 1987Rainbow Trout123,4804.5 inreport
May 19, 1987Rainbow Trout131,7904.5 inreport
May 13, 1987Rainbow Trout2,100–report
April 28, 1987Rainbow Trout31,200–report
August 18, 1986Rainbow Trout23,520–report
August 4, 1986Rainbow Trout86,0004.5 inreport
July 28, 1986Rainbow Trout30,050–report
July 24, 1986Rainbow Trout19,8454.5 inreport
July 24, 1986Rainbow Trout3,570–report
July 23, 1986Rainbow Trout35,2804.5 inreport
July 22, 1986Rainbow Trout30,9604.5 inreport
July 18, 1986Rainbow Trout14,0004.5 inreport
July 10, 1986Rainbow Trout135,0504.5 inreport
July 7, 1986Coho Salmon36,0004.5 inreport
July 3, 1986Rainbow Trout51,3004.5 inreport
July 2, 1986Rainbow Trout79,4904.5 inreport
June 25, 1986Coho Salmon167,7004.5 inreport
June 24, 1986Coho Salmon83,8504.5 inreport
June 23, 1986Coho Salmon162,0004.5 inreport
June 18, 1986Rainbow Trout27,423–report
May 28, 1986Cutthroat Trout3,500–report
May 27, 1986Rainbow Trout25,200–report
May 22, 1986Rainbow Trout18,900–report
May 19, 1986Coho Salmon60,0001.5 inreport
April 28, 1986Rainbow Trout2,000–report
December 6, 1985Rainbow Trout410–report
December 5, 1985Rainbow Trout260–report
September 25, 1985Rainbow Trout10,217–report
September 25, 1985Cutthroat Trout100,2001.5 inreport
September 24, 1985Rainbow Trout10,217–report
September 20, 1985Rainbow Trout18,620–report
August 26, 1985Rainbow Trout1,200–report
July 18, 1985Rainbow Trout23,685–report
July 16, 1985Rainbow Trout2,250–report
July 15, 1985Rainbow Trout118,1954.5 inreport
June 25, 1985Rainbow Trout81,1204.5 inreport
June 24, 1985Rainbow Trout126,0004.5 inreport
June 17, 1985Rainbow Trout2,025–report
June 17, 1985Coho Salmon127,0504.5 inreport
June 6, 1985Kokanee Salmon94,3201.5 inreport
May 31, 1985Rainbow Trout68,4004.5 inreport
May 30, 1985Rainbow Trout392,5004.5 inreport
May 30, 1985Coho Salmon204,0004.5 inreport
May 29, 1985Kokanee Salmon136,0311.5 inreport
May 23, 1985Rainbow Trout44,8004.5 inreport
May 22, 1985Kokanee Salmon353,1151.5 inreport
May 21, 1985Rainbow Trout23,800–report
May 13, 1985Rainbow Trout2,100–report
March 26, 1985Kokanee Salmon250,2241.5 inreport
January 24, 1985Rainbow Trout208,3674.5 inreport
November 20, 1984Rainbow Trout180,0001.5 inreport
September 27, 1984Rainbow Trout12,300–report
September 24, 1984Rainbow Trout2,3754.5 inreport
September 14, 1984Rainbow Trout12,7204.5 inreport
September 6, 1984Rainbow Trout105,0004.5 inreport
September 5, 1984Rainbow Trout48,0004.5 inreport
September 5, 1984Rainbow Trout40,410–report
September 4, 1984Rainbow Trout88,7304.5 inreport
August 29, 1984Rainbow Trout19,1704.5 inreport
May 30, 1984Coho Salmon33,0004.5 inreport
May 29, 1984Rainbow Trout23,800–report
May 22, 1984Rainbow Trout16,380–report
May 17, 1984Rainbow Trout16,800–report
October 24, 1983Kokanee Salmon708,288–report
October 20, 1983Rainbow Trout31,9204.5 inreport
October 11, 1983Rainbow Trout15,3904.5 inreport
September 27, 1983Rainbow Trout16,4704.5 inreport
September 21, 1983Rainbow Trout34,1604.5 inreport
July 25, 1983Rainbow Trout18,0904.5 inreport
May 12, 1983Rainbow Trout25,200–report
September 14, 1982Rainbow Trout7,680–report
September 7, 1982Rainbow Trout5,0004.5 inreport
September 3, 1982Rainbow Trout5,0004.5 inreport
September 2, 1982Rainbow Trout5,0004.5 inreport
August 30, 1982Rainbow Trout26,460–report
August 27, 1982Rainbow Trout21,830–report
August 5, 1982Rainbow Trout14,8004.5 inreport
August 2, 1982Rainbow Trout54,4004.5 inreport
July 26, 1982Rainbow Trout58,7534.5 inreport
June 29, 1982Cutbow112,9961.5 inreport
June 29, 1982Cutbow112,9961.5 inreport
June 22, 1982Rainbow Trout36,4004.5 inreport
June 22, 1982Coho Salmon36,4001.5 inreport
June 21, 1982Rainbow Trout2,800–report
June 18, 1982Coho Salmon302,4001.5 inreport
June 16, 1982Rainbow Trout26,7904.5 inreport
June 14, 1982Rainbow Trout42,8404.5 inreport
June 11, 1982Rainbow Trout67,6444.5 inreport
June 8, 1982Rainbow Trout38,8804.5 inreport
June 7, 1982Rainbow Trout18,7584.5 inreport
May 18, 1982Rainbow Trout20,160–report
May 13, 1982Coho Salmon163,6991.5 inreport
May 12, 1982Rainbow Trout22,050–report
April 20, 1982Rainbow Trout253,0504.5 inreport
November 19, 1981Rainbow Trout7,3604.5 inreport
September 2, 1981Rainbow Trout18,375–report
August 20, 1981Rainbow Trout13,440–report
July 14, 1981Rainbow Trout15,6004.5 inreport
July 1, 1981Rainbow Trout4,500–report
June 29, 1981Rainbow Trout990–report
May 12, 1981Rainbow Trout100,8004.5 inreport
May 11, 1981Rainbow Trout100,8404.5 inreport
April 30, 1981Coho Salmon503,1334.5 inreport
April 22, 1981Coho Salmon51,0304.5 inreport
April 9, 1981Rainbow Trout4,305–report
March 26, 1981Rainbow Trout14,7701.5 inreport
March 18, 1981Rainbow Trout139,8601.5 inreport
October 7, 1980Rainbow Trout31,6254.5 inreport
August 18, 1980Rainbow Trout14,7004.5 inreport
August 18, 1980Coho Salmon9,9004.5 inreport
August 13, 1980Rainbow Trout42,2004.5 inreport
July 24, 1980Rainbow Trout74,4004.5 inreport
June 23, 1980Rainbow Trout12,0604.5 inreport
June 6, 1980Rainbow Trout40,6004.5 inreport
May 30, 1980Rainbow Trout38,3934.5 inreport
May 28, 1980Rainbow Trout31,6104.5 inreport
May 15, 1980Rainbow Trout56,8404.5 inreport
May 14, 1980Rainbow Trout39,0604.5 inreport
May 14, 1980Rainbow Trout25,330–report
May 14, 1980Coho Salmon84,0004.5 inreport
May 13, 1980Rainbow Trout17,640–report
May 13, 1980Coho Salmon125,4004.5 inreport
May 12, 1980Rainbow Trout19,530–report
May 8, 1980Coho Salmon212,0001.5 inreport
May 8, 1980Coho Salmon126,4504.5 inreport
May 6, 1980Rainbow Trout37,8754.5 inreport
October 30, 1979Rainbow Trout63,7004.5 inreport
October 23, 1979Rainbow Trout75,6604.5 inreport
October 15, 1979Rainbow Trout33,0154.5 inreport
May 26, 1978Rainbow Trout900–report
May 25, 1978Rainbow Trout7,8004.5 inreport
May 24, 1978Rainbow Trout15,9754.5 inreport
May 22, 1978Rainbow Trout13,2004.5 inreport
May 19, 1978Rainbow Trout4,200–report
May 17, 1978Rainbow Trout4,200–report
May 16, 1978Rainbow Trout4,200–report
June 23, 1976Rainbow Trout79,7504.5 inreport
June 22, 1976Coho Salmon49,2804.5 inreport
June 21, 1976Coho Salmon74,5804.5 inreport
June 16, 1976Rainbow Trout110,0004.5 inreport
June 15, 1976Rainbow Trout192,5004.5 inreport
June 4, 1976Coho Salmon52,0004.5 inreport
June 2, 1976Coho Salmon96,0004.5 inreport
May 18, 1976Coho Salmon120,4001.5 inreport
May 17, 1976Coho Salmon67,2001.5 inreport
August 19, 1975Rainbow Trout81,6004.5 inreport
August 18, 1975Rainbow Trout103,7004.5 inreport
August 15, 1975Rainbow Trout166,9584.5 inreport
August 13, 1975Rainbow Trout22,4844.5 inreport
August 12, 1975Rainbow Trout29,6004.5 inreport
August 11, 1975Rainbow Trout18,4004.5 inreport
August 7, 1975Rainbow Trout55,2004.5 inreport
August 6, 1975Rainbow Trout42,2804.5 inreport
August 5, 1975Rainbow Trout19,0804.5 inreport
August 4, 1975Rainbow Trout19,0804.5 inreport
June 6, 1975Coho Salmon478,8001.5 inreport
August 26, 1974Rainbow Trout60,0004.5 inreport
June 20, 1974Coho Salmon71,8311.5 inreport
June 19, 1974Coho Salmon65,5091.5 inreport
June 18, 1974Coho Salmon65,4001.5 inreport
June 14, 1974Coho Salmon64,2001.5 inreport
September 24, 1973Rainbow Trout67,5004.5 inreport
September 21, 1973Rainbow Trout32,4144.5 inreport
September 20, 1973Rainbow Trout32,2504.5 inreport
September 14, 1973Rainbow Trout63,7504.5 inreport
September 13, 1973Rainbow Trout24,5004.5 inreport
September 12, 1973Rainbow Trout24,5004.5 inreport
August 9, 1973Rainbow Trout1,000–report
July 24, 1973Cutthroat Trout351,0721.5 inreport
July 10, 1973Cutthroat Trout280,0001.5 inreport
June 22, 1973Rainbow Trout180,0001.5 inreport
June 13, 1973Coho Salmon135,0001.5 inreport
June 12, 1973Coho Salmon94,5001.5 inreport
June 8, 1973Coho Salmon114,7501.5 inreport
May 21, 1973Rainbow Trout84,8001.5 inreport
May 18, 1973Rainbow Trout4,0004.5 inreport
September 6, 1972Rainbow Trout52,0004.5 inreport
September 5, 1972Rainbow Trout41,6004.5 inreport
August 9, 1972Rainbow Trout204,8001.5 inreport
July 26, 1972Cutbow174,7601.5 inreport
July 26, 1972Cutbow174,7601.5 inreport
July 25, 1972Cutbow174,7601.5 inreport
July 25, 1972Cutbow174,7601.5 inreport
July 21, 1972Rainbow Trout128,0001.5 inreport
June 30, 1972Rainbow Trout1,2004.5 inreport
June 27, 1972Rainbow Trout87,4501.5 inreport
June 15, 1972Coho Salmon41,5004.5 inreport
June 14, 1972Coho Salmon136,9504.5 inreport
June 13, 1972Coho Salmon35,2754.5 inreport
June 9, 1972Rainbow Trout2,7504.5 inreport
June 8, 1972Coho Salmon78,8504.5 inreport
June 6, 1972Coho Salmon16,6004.5 inreport
June 5, 1972Coho Salmon49,8004.5 inreport
May 11, 1972Rainbow Trout80,0001.5 inreport
September 1, 1971Rainbow Trout46,9004.5 inreport
August 23, 1971Cutbow125,6601.5 inreport
August 23, 1971Cutbow125,6601.5 inreport
July 30, 1971Rainbow Trout70,0001.5 inreport
July 12, 1971Rainbow Trout72,0001.5 inreport
July 9, 1971Rainbow Trout68,2004.5 inreport
June 24, 1971Rainbow Trout76,6081.5 inreport
June 17, 1971Coho Salmon28,6004.5 inreport
June 16, 1971Coho Salmon118,8004.5 inreport
June 15, 1971Coho Salmon52,8004.5 inreport
June 14, 1971Coho Salmon143,0004.5 inreport
June 11, 1971Coho Salmon44,0004.5 inreport
September 30, 1970Rainbow Trout24,5004.5 inreport
September 28, 1970Rainbow Trout21,7804.5 inreport
September 25, 1970Rainbow Trout24,8004.5 inreport
September 24, 1970Rainbow Trout28,2404.5 inreport
September 23, 1970Rainbow Trout28,8004.5 inreport
September 22, 1970Rainbow Trout27,2704.5 inreport
September 21, 1970Rainbow Trout28,8604.5 inreport
September 16, 1970Rainbow Trout70,0001.5 inreport
September 15, 1970Rainbow Trout20,0001.5 inreport
September 14, 1970Rainbow Trout20,0001.5 inreport
September 2, 1970Rainbow Trout3,9004.5 inreport
August 21, 1970Rainbow Trout80,0001.5 inreport
July 13, 1970Rainbow Trout2,220–report
June 18, 1970Coho Salmon50,0001.5 inreport
June 17, 1970Coho Salmon53,0001.5 inreport
June 3, 1970Coho Salmon130,0001.5 inreport
July 10, 1969Coho Salmon17,2004.5 inreport
July 9, 1969Coho Salmon51,6004.5 inreport
July 8, 1969Coho Salmon51,6004.5 inreport
June 30, 1969Coho Salmon51,6004.5 inreport
June 18, 1969Rainbow Trout72,0001.5 inreport
June 17, 1969Rainbow Trout90,0001.5 inreport
June 9, 1969Coho Salmon70,2001.5 inreport
June 3, 1969Rainbow Trout120,0001.5 inreport
May 14, 1969Rainbow Trout50,0001.5 inreport
March 13, 1969Kokanee Salmon200,0001.5 inreport
September 3, 1968Rainbow Trout112,0004.5 inreport
August 27, 1968Rainbow Trout42,8001.5 inreport
August 26, 1968Rainbow Trout49,2201.5 inreport
August 22, 1968Rainbow Trout22,1004.5 inreport
August 14, 1968Rainbow Trout22,8004.5 inreport
August 2, 1968Rainbow Trout2,0404.5 inreport
August 1, 1968Rainbow Trout40,0004.5 inreport
July 26, 1968Rainbow Trout3,3154.5 inreport
July 22, 1968Rainbow Trout70,0004.5 inreport
July 16, 1968Rainbow Trout30,0004.5 inreport
July 12, 1968Rainbow Trout2,880–report
July 11, 1968Rainbow Trout48,0004.5 inreport
July 2, 1968Rainbow Trout66,0001.5 inreport
June 28, 1968Rainbow Trout3,440–report
June 24, 1968Rainbow Trout12,0004.5 inreport
June 21, 1968Rainbow Trout18,0004.5 inreport
June 20, 1968Rainbow Trout30,0004.5 inreport
June 19, 1968Coho Salmon51,0004.5 inreport
June 17, 1968Coho Salmon112,2001.5 inreport
June 7, 1968Coho Salmon21,0004.5 inreport
June 6, 1968Rainbow Trout1,750–report
June 5, 1968Coho Salmon81,6001.5 inreport
June 4, 1968Rainbow Trout600–report
May 27, 1968Rainbow Trout1,900–report
April 22, 1968Kokanee Salmon360,0001.5 inreport

Access and facts

Water type
reservoir
Nearest town
Island Park
Facilities
restrooms, camping, dock

A Henrys Fork reservoir west of US 20 in Caribou-Targhee NF. USFS lists ramps and docks at Buttermilk, McCrea Bridge, Mill Creek, Lakeside Lodge, Island Park and the West End. Best by boat in summer; bank fishing is good spring and fall; ice fishing near the dam. Irrigation draws it down in summer.

Drafted by AI from the cited sources and checked before publishing.

View larger map · Open in Google Maps · Directions

Advisories, closures, regulations and water conditions change. Check the Idaho Department of Fish and Game before you go.

About Island Park Reservoir

Photo of Island Park Reservoir
U.S. Bureau of Reclamation, Public domain

Nearest lakes

Horseshoe Lake 27 mi last stocked May 29, 2026 Rexburg City Ponds 40.5 mi last stocked August 12, 2026 Trail Creek Pond 61.5 mi last stocked August 27, 2026 Louis Pond 65.9 mi last stocked May 27, 2026 Becker Pond 69.5 mi last stocked September 14, 2026

Public land at Island Park Reservoir

Island Park Reservoir is inside Harriman State Park (Idaho).

It is 0.9 miles outside the edge of Caribou-Targhee National Forest.

Boundaries from Public Lands DB, part of the same network.

Common questions

What fish are at Island Park Reservoir?

Fishing Island Park Reservoir usually means Rainbow Trout: Rainbow Trout accounts for 444 of 650 plants on record, ahead of Cutbow and 5 more. Rainbow Trout was last stocked May 20, 2026, averaging 4.9 in. Cutbow was last stocked August 25, 1997, averaging 3.5 in. Coho Salmon was last stocked June 12, 1989, averaging 3.5 in. Kokanee Salmon was last stocked June 22, 2022, averaging 3.1 in. 3 more species are on the stocking report. Brook Trout, Mountain Whitefish, Utah Chub, and Utah Sucker, plus 2 more are recorded here outside the stocking reports.

When is Island Park Reservoir stocked?

Last stocked October 22, 2026. It is stocked about 11 times a year since 1968, most often in June and September. No plants recorded in 1977.

How big are the fish stocked at Island Park Reservoir?

Stocked fish average 4.2 in. Rainbow Trout average 4.9 in. Cutbow average 3.5 in. Coho Salmon average 3.5 in. Kokanee Salmon average 3.1 in.

How do you get on Island Park Reservoir?

The nearest town is Island Park. Facilities include restrooms, camping, and dock. A Henrys Fork reservoir west of US 20 in Caribou-Targhee NF. USFS lists ramps and docks at Buttermilk, McCrea Bridge, Mill Creek, Lakeside Lodge, Island Park and the West End. Best by boat in summer; bank fishing is good spring and fall; ice fishing near the dam. Irrigation draws it down in summer.

Which lakes near Island Park Reservoir were stocked more recently?

Horseshoe Lake (27 mi), Rexburg City Ponds (40.5 mi), Trail Creek Pond (61.5 mi), Louis Pond (65.9 mi), and Becker Pond (69.5 mi) were stocked more recently. Horseshoe Lake is also stocked with Rainbow Trout and Cutbow, Rexburg City Ponds is also stocked with Rainbow Trout and Splake, Trail Creek Pond is also stocked with Rainbow Trout, Louis Pond is also stocked with Rainbow Trout, and Becker Pond is also stocked with Rainbow Trout, Kokanee Salmon, and Steelhead.

Sources (9) +