Clark Reservoir fishing

Clark Reservoir fishing has Rainbow Trout on the stocking report. It is stocked about 0.9 times a year since 2011, most often in April and May. Species guides list dawn and dusk as the active times.

AI-generated illustration, not a photo of this lake

Last stocked: May 7, 2026; May 07 · Rainbow Trout
Plants on record: 14; Since 2011
Species recorded: 1
Average size: 2.3 in
Elevation: 3,080.4 ft

Fish at Clark Reservoir

1 stocked · 0 confirmed present

Around the dates Clark Reservoir is stocked, Open-Meteo's 2016-2025 archive puts mean air temperature at 43.2°F in April, 55.5°F in May, 65.7°F in June. That is air temperature at these coordinates, not water temperature. Open-Meteo

Rainbow Trout Stocked · 14 plants · last May 7, 2026 Best: dawn, dusk

Last stocked May 7, 2026 · avg 2.3 in · 14 plants

Best: dawn, dusk

Rainbow Trout species guide

How Clark Reservoir is stocked

Source: Montana Fish, Wildlife & Parks.

No plants recorded in 2014 and 2015.

Fish stocked in 2011

2,500

Fish stocked in 2012

2,500

Fish stocked in 2013

2,500

Fish stocked in 2016

2,500

Fish stocked in 2017

2,500

Fish stocked in 2018

2,500

Fish stocked in 2019

2,500

Fish stocked in 2020

2,500

Fish stocked in 2021

2,500

Fish stocked in 2022

2,500

Fish stocked in 2023

2,500

Fish stocked in 2024

2,500

Fish stocked in 2025

2,500

Fish stocked in 2026

2,500

Stocking history

Source: Montana Fish, Wildlife & Parks.
Date	Species	Quantity	Avg. length	Source
May 7, 2026	Rainbow Trout	2,500	2.76 in	report
May 14, 2025	Rainbow Trout	2,500	2.26 in	report
May 24, 2024	Rainbow Trout	2,500	1.78 in	report
May 18, 2023	Rainbow Trout	2,500	2.27 in	report
April 28, 2022	Rainbow Trout	2,500	2 in	report
June 9, 2021	Rainbow Trout	2,500	2.51 in	report
April 23, 2020	Rainbow Trout	2,500	4.41 in	report
April 24, 2019	Rainbow Trout	2,500	1.88 in	report
May 3, 2018	Rainbow Trout	2,500	2.01 in	report
April 12, 2017	Rainbow Trout	2,500	1.98 in	report
April 6, 2016	Rainbow Trout	2,500	1.9 in	report
April 12, 2013	Rainbow Trout	2,500	2 in	report
April 19, 2012	Rainbow Trout	2,500	2.15 in	report
April 23, 2011	Rainbow Trout	2,500	2 in	report

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

Chamberlain Reservoir #3 5.4 mi last stocked May 7, 2026 Saylor Pond 6.1 mi last stocked May 7, 2026 Watt Reservoir 7.6 mi last stocked May 7, 2026 Kreider Reservoir #2 20 mi last stocked August 7, 2025 Fort Peck Lake 29.5 mi last stocked August 4, 2026

Common questions

What fish are at Clark Reservoir?

Fishing Clark Reservoir usually means Rainbow Trout. All 14 plants on record are Rainbow Trout. Rainbow Trout was last stocked May 7, 2026, averaging 2.3 in.

When is Clark Reservoir stocked?

Last stocked May 7, 2026. It is stocked about 0.9 times a year since 2011, most often in April and May. No plants recorded in 2014 and 2015.

How big are the fish stocked at Clark Reservoir?

Rainbow Trout stocked at Clark Reservoir average 2.3 in.

Which lakes near Clark Reservoir were stocked more recently?

Fort Peck Lake (29.5 mi) was stocked more recently.