Loon Lake fishing

Loon Lake fishing has Rainbow Trout, Smallmouth Bass, and Cutthroat Trout on the stocking report. It is stocked about 2.6 times a year since 2011, most often in May and July. Species guides list dawn and dusk as the active times.

AI-generated illustration, not a photo of this lake
Last stocked
May 28, 2026
· Rainbow Trout
Plants on record
41
Since 2011
Species recorded
3
Average size
5.5 in
Elevation
4,043.3 ft

Fish at Loon Lake

3 stocked · 0 confirmed present

Around the dates Loon Lake is stocked, Open-Meteo's 2016-2025 archive puts mean air temperature at 50.1°F in May, 67.3°F in July, 65.9°F in August, 39.1°F in April. That is air temperature at these coordinates, not water temperature. Open-Meteo

Rainbow Trout Stocked · 22 plants · last May 28, 2026 Best: dawn, dusk

Last stocked May 28, 2026 · avg 8.8 in · 22 plants

Best: dawn, dusk

Rainbow Trout species guide
Cutthroat Trout Stocked · 12 plants · last August 9, 2024

Last stocked August 9, 2024 · avg 1.5 in · 12 plants

Cutthroat Trout species guide
Smallmouth Bass Stocked · 7 plants · last July 18, 2012 Best: dawn, dusk

Last stocked July 18, 2012 · avg 2 in · 7 plants

Best: dawn, dusk

Smallmouth Bass species guide

How Loon Lake is stocked

Source: Montana Fish, Wildlife & Parks.

Bootjack Lake (9.9 mi) was stocked more recently. Bootjack Lake is also stocked with Rainbow Trout and Cutthroat Trout.

Fish stocked in 2011

80,624

Fish stocked in 2012

56,862

Fish stocked in 2013

5,010

Fish stocked in 2014

6,950

Fish stocked in 2015

4,682

Fish stocked in 2016

2,924

Fish stocked in 2017

4,585

Fish stocked in 2018

1,000

Fish stocked in 2019

3,000

Fish stocked in 2020

2,618

Fish stocked in 2021

5,140

Fish stocked in 2022

5,000

Fish stocked in 2023

5,237

Fish stocked in 2024

5,084

Fish stocked in 2025

2,196

Fish stocked in 2026

1,832

Stocking history

Source: Montana Fish, Wildlife & Parks.
Date Species Quantity Avg. length Source
May 28, 2026Rainbow Trout1,8328.5 inreport
May 20, 2025Rainbow Trout2,1967.69 inreport
August 9, 2024Cutthroat Trout3,0001.5 inreport
May 23, 2024Rainbow Trout2,0847.83 inreport
July 15, 2023Cutthroat Trout3,0001.14 inreport
May 23, 2023Rainbow Trout2,2377.31 inreport
July 25, 2022Cutthroat Trout3,0001.31 inreport
June 8, 2022Rainbow Trout2,0008.1 inreport
August 11, 2021Cutthroat Trout3,0001.4 inreport
May 19, 2021Rainbow Trout2,1408.63 inreport
May 13, 2020Rainbow Trout2,6188.95 inreport
August 5, 2019Cutthroat Trout1,0001.21 inreport
May 21, 2019Rainbow Trout2,00010.77 inreport
May 9, 2018Rainbow Trout1,00010.75 inreport
September 29, 2017Cutthroat Trout2,5802 inreport
June 21, 2017Rainbow Trout1,28010.77 inreport
May 23, 2017Rainbow Trout72510.65 inreport
September 26, 2016Rainbow Trout1,0404.97 inreport
March 30, 2016Rainbow Trout92810.4 inreport
March 24, 2016Rainbow Trout95610.15 inreport
August 28, 2015Cutthroat Trout2,6821.65 inreport
April 15, 2015Rainbow Trout2,00010.53 inreport
September 26, 2014Cutthroat Trout1,7861.67 inreport
September 4, 2014Cutthroat Trout3,1641.45 inreport
April 15, 2014Rainbow Trout1,0009.16 inreport
April 9, 2014Rainbow Trout1,0009 inreport
August 5, 2013Cutthroat Trout3,0001.1 inreport
May 1, 2013Rainbow Trout2,0106.86 inreport
September 18, 2012Cutthroat Trout2,8622.07 inreport
July 18, 2012Smallmouth Bass23,8002 inreport
July 18, 2012Smallmouth Bass23,8002 inreport
July 18, 2012Smallmouth Bass4,2002 inreport
April 17, 2012Rainbow Trout1,1008.55 inreport
April 16, 2012Rainbow Trout1,1008.55 inreport
August 29, 2011Cutthroat Trout3,0161.47 inreport
July 20, 2011Smallmouth Bass23,8002 inreport
July 20, 2011Smallmouth Bass23,8002 inreport
July 20, 2011Smallmouth Bass23,8002 inreport
July 20, 2011Smallmouth Bass4,2002 inreport
May 17, 2011Rainbow Trout1,0008.32 inreport
May 12, 2011Rainbow Trout1,0088.16 inreport

Access and facts

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Advisories, closures, regulations and water conditions change. Check the Montana Fish, Wildlife & Parks before you go.

Nearest lakes

Ashley Lake 1.2 mi last stocked September 14, 2023 Little Bitterroot Lake 7.4 mi last stocked June 20, 2024 Bootjack Lake 9.9 mi last stocked June 8, 2026 Rogers Lake 10.3 mi last stocked September 6, 2024 Sylvia Lake 12.2 mi last stocked August 8, 2025

Public land at Loon Lake

Loon Lake is 0.1 miles outside the edge of Flathead National Forest.

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

Common questions

What fish are at Loon Lake?

Fishing Loon Lake usually means Rainbow Trout: Rainbow Trout accounts for 22 of 41 plants on record, ahead of Cutthroat Trout and one more. Rainbow Trout was last stocked May 28, 2026, averaging 8.8 in. Cutthroat Trout was last stocked August 9, 2024, averaging 1.5 in. Smallmouth Bass was last stocked July 18, 2012, averaging 2 in.

When is Loon Lake stocked?

Last stocked May 28, 2026. It is stocked about 2.6 times a year since 2011, most often in May and July.

How big are the fish stocked at Loon Lake?

Stocked fish average 5.5 in. Rainbow Trout average 8.8 in. Cutthroat Trout average 1.5 in. Smallmouth Bass average 2 in.

Which lakes near Loon Lake were stocked more recently?

Bootjack Lake (9.9 mi) was stocked more recently. Bootjack Lake is also stocked with Rainbow Trout and Cutthroat Trout.