Loon Lake fishing

Fishing at Loon Lake 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.

Last stocked

May 28, 2026

Plants on record

41

Since 2011

Species recorded

3

Average size

5.5 in

Elevation

4,043.3 ft

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How Loon Lake is stocked

The first plant of the year usually falls in the second week of May. In 2026 it was May 28, 2026, later than usual.

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

Fish at Loon Lake

Fishing Loon Lake is most likely to be for Rainbow Trout. Rainbow Trout accounts for 22 of 41 plants on record, ahead of Cutthroat Trout and one more.

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 22 plants
Plants
22 of 41
Last stocked
May 28, 2026
Average length
8.8 in

Seasons and rigs are on the Rainbow Trout guide.

Cutthroat Trout 12 plants
Plants
12 of 41
Last stocked
August 9, 2024
Average length
1.5 in

Seasons and rigs are on the Cutthroat Trout guide.

Smallmouth Bass 7 plants
Plants
7 of 41
Last stocked
July 18, 2012
Average length
2 in

Seasons and rigs are on the Smallmouth Bass guide.

Fish stocked per year

  • 80,6242011
  • 56,8622012
  • 5,0102013
  • 6,9502014
  • 4,6822015
  • 2,9242016
  • 4,5852017
  • 1,0002018
  • 3,0002019
  • 2,6182020
  • 5,1402021
  • 5,0002022
  • 5,2372023
  • 5,0842024
  • 2,1962025
  • 1,8322026

Stocking history

Showing 15 of 41 plants Showing 41 plants

Source: Montana Fish, Wildlife & Parks.
Date Species Quantity Avg. length Source
May 28, 2026 Rainbow Trout 1,832 8.5 in report
May 20, 2025 Rainbow Trout 2,196 7.69 in report
August 9, 2024 Cutthroat Trout 3,000 1.5 in report
May 23, 2024 Rainbow Trout 2,084 7.83 in report
July 15, 2023 Cutthroat Trout 3,000 1.14 in report
May 23, 2023 Rainbow Trout 2,237 7.31 in report
July 25, 2022 Cutthroat Trout 3,000 1.31 in report
June 8, 2022 Rainbow Trout 2,000 8.1 in report
August 11, 2021 Cutthroat Trout 3,000 1.4 in report
May 19, 2021 Rainbow Trout 2,140 8.63 in report
May 13, 2020 Rainbow Trout 2,618 8.95 in report
August 5, 2019 Cutthroat Trout 1,000 1.21 in report
May 21, 2019 Rainbow Trout 2,000 10.77 in report
May 9, 2018 Rainbow Trout 1,000 10.75 in report
September 29, 2017 Cutthroat Trout 2,580 2 in report
June 21, 2017 Rainbow Trout 1,280 10.77 in report
May 23, 2017 Rainbow Trout 725 10.65 in report
September 26, 2016 Rainbow Trout 1,040 4.97 in report
March 30, 2016 Rainbow Trout 928 10.4 in report
March 24, 2016 Rainbow Trout 956 10.15 in report
August 28, 2015 Cutthroat Trout 2,682 1.65 in report
April 15, 2015 Rainbow Trout 2,000 10.53 in report
September 26, 2014 Cutthroat Trout 1,786 1.67 in report
September 4, 2014 Cutthroat Trout 3,164 1.45 in report
April 15, 2014 Rainbow Trout 1,000 9.16 in report
April 9, 2014 Rainbow Trout 1,000 9 in report
August 5, 2013 Cutthroat Trout 3,000 1.1 in report
May 1, 2013 Rainbow Trout 2,010 6.86 in report
September 18, 2012 Cutthroat Trout 2,862 2.07 in report
July 18, 2012 Smallmouth Bass 23,800 2 in report
July 18, 2012 Smallmouth Bass 23,800 2 in report
July 18, 2012 Smallmouth Bass 4,200 2 in report
April 17, 2012 Rainbow Trout 1,100 8.55 in report
April 16, 2012 Rainbow Trout 1,100 8.55 in report
August 29, 2011 Cutthroat Trout 3,016 1.47 in report
July 20, 2011 Smallmouth Bass 23,800 2 in report
July 20, 2011 Smallmouth Bass 23,800 2 in report
July 20, 2011 Smallmouth Bass 23,800 2 in report
July 20, 2011 Smallmouth Bass 4,200 2 in report
May 17, 2011 Rainbow Trout 1,000 8.32 in report
May 12, 2011 Rainbow Trout 1,008 8.16 in report
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Species stocked here

Depth-by-season, top lures, and bait notes for each species stocked here are on its own species guide, linked above.

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