Grasshopper Reservoir fishing

Fishing at Grasshopper Reservoir has Rainbow Trout and Tiger Muskie on the stocking report. It is stocked about 1.7 times a year since 2011, most often in May and September. Species guides list dawn and dusk as the active times.

Last stocked

September 23, 2025

Plants on record

25

Since 2011

Species recorded

2

Average size

4 in

Elevation

3,082.1 ft

Access and facts

Nearest town
Chinook

Small (about 23-acre) reservoir south of Chinook: take Hwy 240 south 4.5 miles, then Lloyd Road about 7 miles.

Sources: shore_notes , nearest_town , fishing_notes

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How Grasshopper Reservoir is stocked

The first plant of the year usually falls in the second week of May. In 2025 it was April 30, 2025, earlier than usual.

Ross Reservoir (11 mi) and Salmo Reservoir (15.1 mi) were stocked more recently. Salmo Reservoir is also stocked with Rainbow Trout.

Fish at Grasshopper Reservoir

Fishing Grasshopper Reservoir is most likely to be for Rainbow Trout. Rainbow Trout accounts for 23 of 25 plants on record, ahead of Tiger Muskie.

Around the dates Grasshopper Reservoir is stocked, Open-Meteo's 2016-2025 archive puts mean air temperature at 54.1°F in May, 60.7°F in September, 42°F in April, 63.1°F in June. That is air temperature at these coordinates, not water temperature. Open-Meteo

Rainbow Trout 23 plants
Plants
23 of 25
Last stocked
September 23, 2025
Average length
4 in

Seasons and rigs are on the Rainbow Trout guide.

Tiger Muskie 2 plants
Plants
2 of 25
Last stocked
July 8, 2019
Average length
4 in

Seasons and rigs are on the Tiger Muskie guide.

Fishing Grasshopper Reservoir

For fishing at Grasshopper Reservoir, annual plants of 4,000 Rainbow Trout occur in the spring, and 3,000 Rainbow Trout are stocked in the fall in alternate years. Furthermore, 500 Tiger Muskie fingerlings were stocked in 2019. No landowner permission is required for fishing.

Sources: myfwp.mt.gov

Fish stocked per year

  • 5,4982011
  • 2,5002012
  • 5,6802013
  • 2,5002014
  • 5,6012015
  • 2,5002016
  • 5,7642017
  • 2,5002018
  • 4,0172019
  • 4,2612020
  • 7,0602021
  • 4,0002022
  • 7,3192023
  • 4,0002024
  • 6,5972025

Stocking history

Showing 15 of 25 plants Showing 25 plants

Source: Montana Fish, Wildlife & Parks.
Date Species Quantity Avg. length Source
September 23, 2025 Rainbow Trout 2,597 7.3 in report
April 30, 2025 Rainbow Trout 4,000 2.87 in report
May 28, 2024 Rainbow Trout 4,000 3.23 in report
September 13, 2023 Rainbow Trout 3,056 5.69 in report
May 30, 2023 Rainbow Trout 4,263 2.74 in report
May 25, 2022 Rainbow Trout 4,000 3.25 in report
October 1, 2021 Rainbow Trout 3,060 7.19 in report
June 1, 2021 Rainbow Trout 4,000 3.1 in report
May 6, 2020 Rainbow Trout 4,261 3.08 in report
September 23, 2019 Rainbow Trout 1,017 7.17 in report
July 8, 2019 Tiger Muskie 500 4.93 in report
May 13, 2019 Rainbow Trout 2,500 2.65 in report
May 3, 2018 Rainbow Trout 2,500 2.47 in report
October 11, 2017 Rainbow Trout 3,264 6.97 in report
April 13, 2017 Rainbow Trout 2,500 2.02 in report
April 7, 2016 Rainbow Trout 2,500 2.09 in report
September 15, 2015 Rainbow Trout 3,101 6.73 in report
April 16, 2015 Rainbow Trout 2,500 2.01 in report
May 14, 2014 Rainbow Trout 2,500 2.45 in report
September 13, 2013 Rainbow Trout 3,030 5.99 in report
June 26, 2013 Tiger Muskie 150 3 in report
June 19, 2013 Rainbow Trout 2,500 3.27 in report
May 8, 2012 Rainbow Trout 2,500 2.72 in report
October 4, 2011 Rainbow Trout 2,998 4.13 in report
May 18, 2011 Rainbow Trout 2,500 3.09 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.

Nearest lakes