Rainbow Trout Stocked · 1,650 plants · last September 17, 2026 Best: dawn, dusk Last stocked September 17, 2026 · avg 11.5 in · 1,650 plants
Best: dawn, dusk
Rainbow Trout species guideHagerman WMA Oster Lake #1 fishing has Rainbow Trout and Coho Salmon on the stocking report. Also recorded: Bluegill and Largemouth Bass. It is stocked about 28 times a year since 1968, most often in March and May. Species guides list dawn and dusk for Rainbow Trout and Largemouth Bass and dawn, day, and dusk for Bluegill.
Rainbow Trout Stocked · 1,650 plants · last September 17, 2026 Best: dawn, dusk Last stocked September 17, 2026 · avg 11.5 in · 1,650 plants
Best: dawn, dusk
Rainbow Trout species guide
Coho Salmon Stocked · 1 plant · last September 29, 1999 Last stocked September 29, 1999 · avg 4.5 in · 1 plant
Coho Salmon species guide
Bluegill Confirmed present Best: dawn, day, dusk Best: dawn, day, dusk
Bluegill species guide
Largemouth Bass Confirmed present Best: dawn, dusk Best: dawn, dusk
Largemouth Bass species guideFish stocked in 1968
5,046
Fish stocked in 1969
4,421
Fish stocked in 1970
4,096
Fish stocked in 1971
4,102
Fish stocked in 1972
5,000
Fish stocked in 1973
7,907
Fish stocked in 1974
7,561
Fish stocked in 1975
8,344
Fish stocked in 1976
8,478
Fish stocked in 1977
14,486
Fish stocked in 1978
8,608
Fish stocked in 1979
8,175
Fish stocked in 1980
14,170
Fish stocked in 1981
10,775
Fish stocked in 1982
10,935
Fish stocked in 1983
7,536
Fish stocked in 1984
10,218
Fish stocked in 1985
9,977
Fish stocked in 1986
11,079
Fish stocked in 1987
8,288
Fish stocked in 1988
8,397
Fish stocked in 1989
8,935
Fish stocked in 1990
10,395
Fish stocked in 1991
10,035
Fish stocked in 1992
12,424
Fish stocked in 1993
11,805
Fish stocked in 1994
14,890
Fish stocked in 1995
14,311
Fish stocked in 1996
16,585
Fish stocked in 1997
15,966
Fish stocked in 1998
15,150
Fish stocked in 1999
17,512
Fish stocked in 2000
15,625
Fish stocked in 2001
15,596
Fish stocked in 2002
14,587
Fish stocked in 2003
29,107
Fish stocked in 2004
22,907
Fish stocked in 2005
20,110
Fish stocked in 2006
19,594
Fish stocked in 2007
17,710
Fish stocked in 2008
24,027
Fish stocked in 2009
23,323
Fish stocked in 2010
21,038
Fish stocked in 2011
28,530
Fish stocked in 2012
21,269
Fish stocked in 2013
29,212
Fish stocked in 2014
20,915
Fish stocked in 2015
19,347
Fish stocked in 2016
17,713
Fish stocked in 2017
15,824
Fish stocked in 2018
15,864
Fish stocked in 2019
17,366
Fish stocked in 2020
17,733
Fish stocked in 2021
15,328
Fish stocked in 2022
15,757
Fish stocked in 2023
15,664
Fish stocked in 2024
17,043
Fish stocked in 2025
15,523
Fish stocked in 2026
13,561
One of five Oster Lakes on the southeast side of Hagerman WMA. From Hagerman go 2.8 miles south on US 30, turn east at the national hatchery sign, keep right, and drive 1 mile to the Oster ponds lot, then walk in on trails. ADA access pier here; the shared access site lists an accessible restroom.
Drafted by AI from the cited sources and checked before publishing.
Advisories, closures, regulations and water conditions change. Check the Idaho Department of Fish and Game before you go.
Fishing Hagerman WMA Oster Lake #1 usually means Rainbow Trout: Rainbow Trout accounts for 1650 of 1,651 plants on record, ahead of Coho Salmon. Rainbow Trout was last stocked September 17, 2026, averaging 11.5 in. Coho Salmon was last stocked September 29, 1999, averaging 4.5 in. Bluegill and Largemouth Bass are recorded here outside the stocking reports.
Last stocked September 17, 2026. It is stocked about 28 times a year since 1968, most often in March and May.
Stocked fish average 11.4 in. Rainbow Trout average 11.5 in. Coho Salmon average 4.5 in.
The nearest town is Hagerman. One of five Oster Lakes on the southeast side of Hagerman WMA. From Hagerman go 2.8 miles south on US 30, turn east at the national hatchery sign, keep right, and drive 1 mile to the Oster ponds lot, then walk in on trails. ADA access pier here; the shared access site lists an accessible restroom.