Sentinel Reservoir fishing

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

Last stocked

May 14, 2025

Plants on record

15

Since 2011

Species recorded

1

Average size

2.8 in

Elevation

2,987.6 ft

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How Sentinel Reservoir is stocked

The first plant of the year usually falls in the second week of May. In 2025 it was May 14, 2025, about when it usually is.

Sagebrush Reservoir (3.8 mi), Taint Reservoir (4.2 mi), Lark Reservoir (4.7 mi), and Hump Lake (8.6 mi) were stocked more recently. Sagebrush Reservoir is also stocked with Rainbow Trout, Taint Reservoir is also stocked with Rainbow Trout, and Hump Lake is also stocked with Rainbow Trout.

Fish at Sentinel Reservoir

Fishing Sentinel Reservoir is most likely to be for Rainbow Trout. All 15 plants on record are Rainbow Trout.

Around the dates Sentinel Reservoir is stocked, Open-Meteo's 2016-2025 archive puts mean air temperature at 55.7°F in May, 43.4°F in April, 65.3°F in June. That is air temperature at these coordinates, not water temperature. Open-Meteo

Rainbow Trout 15 plants
Plants
15 of 15
Last stocked
May 14, 2025
Average length
2.8 in

Seasons and rigs are on the Rainbow Trout guide.

Fish stocked per year

  • 6,0002011
  • 6,0002012
  • 6,0002013
  • 6,0002014
  • 6,0002015
  • 6,0002016
  • 6,0062017
  • 6,0002018
  • 6,0002019
  • 6,1852020
  • 6,0002021
  • 6,0002022
  • 6,0002023
  • 6,0002024
  • 6,0002025

Stocking history

Source: Montana Fish, Wildlife & Parks.
Date Species Quantity Avg. length Source
May 14, 2025 Rainbow Trout 6,000 3.17 in report
May 14, 2024 Rainbow Trout 6,000 2.92 in report
May 16, 2023 Rainbow Trout 6,000 2.63 in report
May 10, 2022 Rainbow Trout 6,000 3.25 in report
May 17, 2021 Rainbow Trout 6,000 3.12 in report
May 7, 2020 Rainbow Trout 6,185 3.08 in report
May 13, 2019 Rainbow Trout 6,000 2.65 in report
May 3, 2018 Rainbow Trout 6,000 2.47 in report
May 10, 2017 Rainbow Trout 6,006 2.56 in report
April 7, 2016 Rainbow Trout 6,000 2.09 in report
April 16, 2015 Rainbow Trout 6,000 1.89 in report
April 16, 2014 Rainbow Trout 6,000 2.06 in report
June 27, 2013 Rainbow Trout 6,000 3.21 in report
May 16, 2012 Rainbow Trout 6,000 2.71 in report
June 22, 2011 Rainbow Trout 6,000 3.6 in report

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