Eightmile Springs fishing

Eightmile Springs fishing is stocked with Brook Trout, Rainbow Trout, and Largemouth Bass on a reservoir. It is stocked about 1.9 times a year since 2011, most often in May and August. Species guides list dawn, day, and dusk for Brook Trout and dawn and dusk for Rainbow Trout and Largemouth Bass.

AI-generated illustration, not a photo of this lake
Last stocked
May 13, 2026
· Rainbow Trout
Plants on record
30
Since 2011
Species recorded
3
Average size
4.6 in
Elevation
2,923 ft

Fish at Eightmile Springs

3 stocked · 0 confirmed present

Rainbow Trout Stocked · 16 plants · last May 13, 2026 Best: dawn, dusk

Last stocked May 13, 2026 · avg 7 in · 16 plants

Best: dawn, dusk

Rainbow Trout species guide
Largemouth Bass Stocked · 13 plants · last August 12, 2025 Best: dawn, dusk

Last stocked August 12, 2025 · avg 1.8 in · 13 plants

Best: dawn, dusk

Largemouth Bass species guide
Brook Trout Stocked · 1 plant · last April 27, 2011 Best: dawn, day, dusk

Last stocked April 27, 2011 · avg 2.7 in · 1 plant

Best: dawn, day, dusk

Brook Trout species guide

How Eightmile Springs is stocked

Source: Montana Fish, Wildlife & Parks.

Leningtons Reservoir (13.9 mi), Crow Coulee Reservoir (25.9 mi), Rainbow Dam Reservoir (26.1 mi), and Wadsworth Lake (32.7 mi) were stocked more recently. Leningtons Reservoir is also stocked with Rainbow Trout and Largemouth Bass, Crow Coulee Reservoir is also stocked with Rainbow Trout and Largemouth Bass, Rainbow Dam Reservoir is also stocked with Rainbow Trout, and Wadsworth Lake is also stocked with Brook Trout, Rainbow Trout, and Largemouth Bass.

Fish stocked in 2011

2,500

Fish stocked in 2012

3,500

Fish stocked in 2013

3,000

Fish stocked in 2014

3,063

Fish stocked in 2015

3,000

Fish stocked in 2016

3,000

Fish stocked in 2017

3,000

Fish stocked in 2018

3,000

Fish stocked in 2019

3,586

Fish stocked in 2020

3,000

Fish stocked in 2021

3,000

Fish stocked in 2022

1,500

Fish stocked in 2023

3,000

Fish stocked in 2024

3,000

Fish stocked in 2025

3,000

Fish stocked in 2026

1,000

Stocking history

Source: Montana Fish, Wildlife & Parks.
Date Species Quantity Avg. length Source
May 13, 2026Rainbow Trout1,0007.64 inreport
August 12, 2025Largemouth Bass1,5001.86 inreport
May 28, 2025Rainbow Trout1,5007.64 inreport
August 13, 2024Largemouth Bass1,5001.35 inreport
May 28, 2024Rainbow Trout1,5004.7 inreport
July 27, 2023Largemouth Bass1,5001.8 inreport
May 26, 2023Rainbow Trout1,5007.03 inreport
May 16, 2022Rainbow Trout1,5007.32 inreport
July 22, 2021Largemouth Bass1,5001.92 inreport
May 18, 2021Rainbow Trout1,5007.4 inreport
July 15, 2020Largemouth Bass1,5000.77 inreport
May 27, 2020Rainbow Trout1,5007.49 inreport
July 27, 2019Largemouth Bass2,0861.55 inreport
May 21, 2019Rainbow Trout1,5006.7 inreport
July 26, 2018Largemouth Bass1,5002.32 inreport
May 23, 2018Rainbow Trout1,5006.45 inreport
August 2, 2017Largemouth Bass1,5003.03 inreport
May 18, 2017Rainbow Trout1,5007.7 inreport
August 10, 2016Largemouth Bass1,5001.62 inreport
May 3, 2016Rainbow Trout1,5007.4 inreport
August 12, 2015Largemouth Bass1,5002.5 inreport
April 27, 2015Rainbow Trout1,5006.83 inreport
July 17, 2014Largemouth Bass1,5001.3 inreport
May 1, 2014Rainbow Trout1,5637.42 inreport
August 1, 2013Largemouth Bass1,5002.3 inreport
May 7, 2013Rainbow Trout1,5006.9 inreport
August 8, 2012Largemouth Bass2,0001.5 inreport
May 16, 2012Rainbow Trout1,5006.6 inreport
May 3, 2011Rainbow Trout1,5006.9 inreport
April 27, 2011Brook Trout1,0002.7 inreport

Access and facts

Water type
reservoir
Nearest town
Fort Benton

Also called Tunis Reservoir. From Fort Benton, take US 87 west about 7.5 mi and turn right on Tunis S Rd; the 12-acre reservoir is west of the road. It is on private land that FWP says anglers may use without asking. Park off the main road at the dam and walk down.

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

Leningtons Reservoir 13.9 mi last stocked June 22, 2026 Marias River 15.6 mi last stocked September 14, 2023 Crow Coulee Reservoir 25.9 mi last stocked June 18, 2026 Rainbow Dam Reservoir 26.1 mi last stocked August 26, 2026 Wadsworth Lake 32.7 mi last stocked September 9, 2026

Common questions

What fish are at Eightmile Springs?

Fishing Eightmile Springs usually means Rainbow Trout: Rainbow Trout accounts for 16 of 30 plants on record, ahead of Largemouth Bass and one more. Rainbow Trout was last stocked May 13, 2026, averaging 7 in. Largemouth Bass was last stocked August 12, 2025, averaging 1.8 in. Brook Trout was last stocked April 27, 2011, averaging 2.7 in.

When is Eightmile Springs stocked?

Last stocked May 13, 2026. It is stocked about 1.9 times a year since 2011, most often in May and August.

How big are the fish stocked at Eightmile Springs?

Stocked fish average 4.6 in. Rainbow Trout average 7 in. Largemouth Bass average 1.8 in. Brook Trout average 2.7 in.

How do you get on Eightmile Springs?

The nearest town is Fort Benton. Also called Tunis Reservoir. From Fort Benton, take US 87 west about 7.5 mi and turn right on Tunis S Rd; the 12-acre reservoir is west of the road. It is on private land that FWP says anglers may use without asking. Park off the main road at the dam and walk down.

Which lakes near Eightmile Springs were stocked more recently?

Leningtons Reservoir (13.9 mi), Crow Coulee Reservoir (25.9 mi), Rainbow Dam Reservoir (26.1 mi), and Wadsworth Lake (32.7 mi) were stocked more recently. Leningtons Reservoir is also stocked with Rainbow Trout and Largemouth Bass, Crow Coulee Reservoir is also stocked with Rainbow Trout and Largemouth Bass, Rainbow Dam Reservoir is also stocked with Rainbow Trout, and Wadsworth Lake is also stocked with Brook Trout, Rainbow Trout, and Largemouth Bass.

Sources (2) +