Ackley Lake fishing

Ackley Lake fishing is stocked with Rainbow Trout, Brown Trout, and Tiger Muskie on a reservoir. Also recorded: White Sucker, Longnose Sucker, Brook Trout, Kokanee, and Mountain Whitefish. It is stocked about 3.3 times a year since 2011, most often in May and June. Species guides list dawn and dusk for Rainbow Trout and Kokanee and dawn, day, and dusk for Brown Trout and Brook Trout.

AI-generated illustration, not a photo of this lake
Last stocked
May 20, 2026
· Rainbow Trout
Plants on record
52
Since 2011
Species stocked
3 (+5 also recorded)
Average size
4.1 in
Elevation
4,314.9 ft

Fish at Ackley Lake

3 stocked · 5 confirmed present

Around the dates Ackley Lake is stocked, Open-Meteo's 2016-2025 archive puts mean air temperature at 51°F in May, 60.4°F in June, 69.4°F in July, 58.8°F in September. That is air temperature at these coordinates, not water temperature. Open-Meteo

Rainbow Trout Stocked · 47 plants · last May 20, 2026 Best: dawn, dusk

Last stocked May 20, 2026 · avg 4 in · 47 plants

Best: dawn, dusk

Rainbow Trout species guide
Tiger Muskie Stocked · 3 plants · last July 14, 2023

Last stocked July 14, 2023 · avg 5.4 in · 3 plants

Tiger Muskie species guide
Brown Trout Stocked · 2 plants · last May 14, 2024 Best: dawn, day, dusk

Last stocked May 14, 2024 · avg 3.7 in · 2 plants

Best: dawn, day, dusk

Brown Trout species guide

Ackley Lake State Park offers stocked trout fishing. Today, the diverse recreation opportunities at this 290-acre park include fishing. The lake is stocked with rainbow trout and tiger muskie, and it often provides good angling. (en.wikipedia.org, accessed September 22, 2026)(fwp.mt.gov, accessed September 22, 2026)

Drafted by AI from the cited sources and checked before publishing.

How Ackley Lake is stocked

Source: Montana Fish, Wildlife & Parks.

Brewington Pond South (24.6 mi), Upper Frog Pond (25 mi), Carters Pond (27.4 mi), and Upper Carters Pond (27.8 mi) were stocked more recently. Brewington Pond South is also stocked with Rainbow Trout, Upper Frog Pond is also stocked with Rainbow Trout, Carters Pond is also stocked with Rainbow Trout, and Upper Carters Pond is also stocked with Rainbow Trout.

Fish stocked in 2011

40,002

Fish stocked in 2012

40,018

Fish stocked in 2013

40,162

Fish stocked in 2014

45,190

Fish stocked in 2015

61,636

Fish stocked in 2016

45,388

Fish stocked in 2017

62,325

Fish stocked in 2018

49,972

Fish stocked in 2019

60,345

Fish stocked in 2020

56,846

Fish stocked in 2021

62,084

Fish stocked in 2022

44,612

Fish stocked in 2023

25,039

Fish stocked in 2024

33,734

Fish stocked in 2025

25,363

Fish stocked in 2026

24,970

Stocking history

Source: Montana Fish, Wildlife & Parks.
Date Species Quantity Avg. length Source
May 20, 2026Rainbow Trout14,6704.18 inreport
May 20, 2026Rainbow Trout10,3002.84 inreport
May 13, 2025Rainbow Trout10,0173.01 inreport
May 13, 2025Rainbow Trout15,3464.33 inreport
November 19, 2024Rainbow Trout4,6832.34 inreport
July 10, 2024Rainbow Trout1,3178.09 inreport
May 14, 2024Rainbow Trout15,0364.29 inreport
May 14, 2024Rainbow Trout10,1802.81 inreport
May 14, 2024Brown Trout2,5183.47 inreport
July 14, 2023Tiger Muskie20010.86 inreport
May 22, 2023Rainbow Trout10,0003.33 inreport
May 22, 2023Rainbow Trout14,8394.38 inreport
June 30, 2022Rainbow Trout2986.31 inreport
May 23, 2022Rainbow Trout9,5703.41 inreport
May 19, 2022Rainbow Trout34,7443.77 inreport
June 21, 2021Rainbow Trout4,9765.27 inreport
May 10, 2021Rainbow Trout35,0384.28 inreport
May 10, 2021Rainbow Trout22,0702.85 inreport
May 11, 2020Rainbow Trout20,0362.77 inreport
May 11, 2020Rainbow Trout36,8103.86 inreport
June 26, 2019Rainbow Trout1,4559.51 inreport
May 21, 2019Rainbow Trout23,8693.1 inreport
May 2, 2019Rainbow Trout35,0213.8 inreport
September 20, 2018Rainbow Trout11,2385.47 inreport
July 2, 2018Rainbow Trout3,7004.88 inreport
May 24, 2018Rainbow Trout15,0303 inreport
May 14, 2018Rainbow Trout20,0044.06 inreport
September 20, 2017Rainbow Trout16,9435.01 inreport
June 6, 2017Rainbow Trout15,3074.44 inreport
May 16, 2017Rainbow Trout11,7353.08 inreport
May 16, 2017Rainbow Trout3,2963.12 inreport
April 27, 2017Rainbow Trout15,0444.82 inreport
September 22, 2016Rainbow Trout15,3594.73 inreport
May 16, 2016Rainbow Trout15,0153.01 inreport
May 2, 2016Rainbow Trout15,0143.8 inreport
September 22, 2015Rainbow Trout10,0964.88 inreport
July 15, 2015Tiger Muskie1,0004 inreport
May 28, 2015Tiger Muskie3,0001.25 inreport
May 20, 2015Rainbow Trout11,3664.11 inreport
May 20, 2015Rainbow Trout3,6575.58 inreport
May 20, 2015Rainbow Trout30,0143.02 inreport
May 20, 2015Brown Trout2,5033.85 inreport
June 5, 2014Rainbow Trout7,9144.24 inreport
June 5, 2014Rainbow Trout7,1134.25 inreport
May 27, 2014Rainbow Trout30,1633.06 inreport
May 22, 2013Rainbow Trout30,0642.88 inreport
May 22, 2013Rainbow Trout10,0984.24 inreport
May 23, 2012Rainbow Trout30,0002.8 inreport
April 11, 2012Rainbow Trout10,0183.22 inreport
June 3, 2011Rainbow Trout17,5742.8 inreport
June 3, 2011Rainbow Trout12,4262.9 inreport
May 9, 2011Rainbow Trout10,0024.06 inreport

Access and facts

Water type
reservoir
Nearest town
Hobson
Boat ramp
Yes
Fee required
Yes
Facilities
camping, dock, restrooms

Ackley Lake State Park near Hobson has two boat launches and a dock on Montana's open plains. 26 rustic first-come, first-served campsites (no electric, water, or dump service) ring the 290-acre park; vault toilets only.

Drafted by AI from the cited sources and checked before publishing.

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

Nearest lakes

Big Casino Creek Reservoir 24.5 mi last stocked August 7, 2025 Brewington Pond South 24.6 mi last stocked May 27, 2026 Upper Frog Pond 25 mi last stocked June 5, 2026 Carters Pond 27.4 mi last stocked May 21, 2026 Upper Carters Pond 27.8 mi last stocked June 3, 2026

Public land at Ackley Lake

Ackley Lake is 0.2 miles outside the edge of Ackley Lake State Park.

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

Common questions

What fish are at Ackley Lake?

Fishing Ackley Lake usually means Rainbow Trout: Rainbow Trout accounts for 47 of 52 plants on record, ahead of Tiger Muskie and one more. Rainbow Trout was last stocked May 20, 2026, averaging 4 in. Tiger Muskie was last stocked July 14, 2023, averaging 5.4 in. Brown Trout was last stocked May 14, 2024, averaging 3.7 in. White Sucker, Longnose Sucker, Brook Trout, and Kokanee, plus 1 more are recorded here outside the stocking reports.

When is Ackley Lake stocked?

Last stocked May 20, 2026. It is stocked about 3.3 times a year since 2011, most often in May and June.

How big are the fish stocked at Ackley Lake?

Stocked fish average 4.1 in. Rainbow Trout average 4 in. Tiger Muskie average 5.4 in. Brown Trout average 3.7 in.

How do you get on Ackley Lake?

There is a boat ramp and a fee is required. The nearest town is Hobson. Facilities include camping, dock, and restrooms. Ackley Lake State Park near Hobson has two boat launches and a dock on Montana's open plains. 26 rustic first-come, first-served campsites (no electric, water, or dump service) ring the 290-acre park; vault toilets only.

Which lakes near Ackley Lake were stocked more recently?

Brewington Pond South (24.6 mi), Upper Frog Pond (25 mi), Carters Pond (27.4 mi), and Upper Carters Pond (27.8 mi) were stocked more recently. Brewington Pond South is also stocked with Rainbow Trout, Upper Frog Pond is also stocked with Rainbow Trout, Carters Pond is also stocked with Rainbow Trout, and Upper Carters Pond is also stocked with Rainbow Trout.

Sources (7) +