Greenough Lake Fish Stocking
Montana · 1933–2026 on record
According to Montana fish & wildlife agency, Greenough Lake was last stocked June 10, 2026 with Rainbow Trout. Greenough Lake has 258 stocking records on file, spanning 1933–2026, with about 328,143 fish stocked over that period.
When Greenough Lake is stocked
Greenough Lake is typically stocked in summer, most often in June — 65 stocking events in that peak month.
Angler's Field Guide
Fishing Tips & Stocking Guide for Greenough Lake
Practical advice on fish behavior, recommended tackle, and state regulations for anglers fishing in Montana.
Post-Plant Behavior & Timing
Hatchery-raised fish are conditioned to pelleted feed and open raceways. Following a release into Greenough Lake, they typically congregate in schools near public access points, boat ramps, or inlets for the first 24 to 48 hours while adjusting to natural water conditions.
Since Greenough Lake was last stocked June 10, 2026, anglers visiting within 1 to 2 weeks of a reported event generally experience the highest activity before fish disperse into deeper cover.
State Regulations & Licensing
- •Fishing License: A valid Montana freshwater fishing license is required for anglers age 16 and older.Purchase Montana license online →
- •Official Rules & Limits: Bag limits, bait restrictions, and seasonal boundaries are set by Montana fish & wildlife agency.Official Montana regulations guidebook →
- •Ethical Conservation: Use barbless hooks and keep fish submerged in water during unhooking.Trout Thermal Advisory: When water temperatures rise above 68°F (20°C), released trout face severe mortality from thermal exhaustion. Target warmwater species or fish early in the morning when lakes and streams warm up.
Recommended Tackle & Presentations
Techniques tailored to the species stocked in Greenough Lake:
Stocked Trout Tactics
Use light 4–6 lb monofilament or fluorocarbon line. Float scented dough bait (PowerBait) 12–18" off bottom using a sliding slip-sinker rig with a size 14–16 treble hook. For active casting, throw 1/16 to 1/8 oz inline spinners (Panther Martin, Rooster Tail) or small spoons (Kastmaster) along drop-offs.
Rainbow Trout Profile Tips
The most commonly targeted stocked trout in the country, taken on bait, spinners, and flies alike; a common first fish for new anglers.
Brook Trout Profile Tips
A favorite of high-country and small-stream anglers; often more willing to strike than brown or rainbow trout in the same water.
Recommended Tackle for Greenough Lake
Field-tested tackle and presentations matched to the species stocked here.
Berkley PowerBait Floating Trout Dough
Hatchery-raised trout are conditioned to pelleted scents; scented dough floated 12–18 inches off bottom consistently triggers strikes.
Panther Martin Classic Teardrop Inline Spinner
The heavy convex blade spins instantly upon retrieval, sending vibration through the water that triggers aggressive reaction bites along drop-offs.
Sliding Sinker & Treble Hook Rigging Kit
Sliding egg sinkers allow cautious trout to run with bait without feeling line drag, while size 14–16 treble hooks keep dough bait securely pinned.
As an Amazon Associate, StockedWaters earns from qualifying purchases at no additional cost to you. Recommendations are chosen for hatchery-conditioned fish behavior and ethical rigging. We may receive a referral commission if you buy through these links. Read our editorial policy & standards.
Nearby stocked waters
Other stocked waters near Greenough Lake, freshest activity first.
Black Canyon Lake
6 mi2 species · 13 records
Last stocked August 2025
Line Lake
4 mi3 species · 20 records
Last stocked August 2024
Hairpin Lake
4 mi1 species · 2 records
Last stocked July 2022
Mountain Goat Lake
7 mi1 species · 13 records
Last stocked July 2022
Hellroaring Lake 6
3 mi2 species · 8 records
Last stocked August 2006
Basin Creek Lake, Lower
7 mi2 species · 3 records
Last stocked August 1997
Stocking history
Most recent stockings first. Dates shown at the precision the agency reported.
| Date | Species | Number | Size | Source |
|---|---|---|---|---|
| June 10, 2026 | Rainbow Trout | 1,502 | 7.3" | Montana fish & wildlife agency |
| May 12, 2026 | Rainbow Trout | 1,514 | 6.68" | Montana fish & wildlife agency |
| August 27, 2025 | Rainbow Trout | 928 | 11.7" | Montana fish & wildlife agency |
| August 27, 2025 | Rainbow Trout | 870 | 11.7" | Montana fish & wildlife agency |
| July 31, 2025 | Rainbow Trout | 340 | 10.5" | Montana fish & wildlife agency |
| July 30, 2025 | Rainbow Trout | 1,170 | 12.1" | Montana fish & wildlife agency |
| June 10, 2025 | Rainbow Trout | 1,500 | 8.9" | Montana fish & wildlife agency |
| May 21, 2025 | Rainbow Trout | 554 | 9.75" | Montana fish & wildlife agency |
Show 42 more stocking records →
| Date | Species | Number | Size | Source |
|---|---|---|---|---|
| May 13, 2025 | Rainbow Trout | 972 | 9.41" | Montana fish & wildlife agency |
| June 20, 2024 | Rainbow Trout | 1,984 | 7.77" | Montana fish & wildlife agency |
| May 30, 2024 | Rainbow Trout | 1,499 | 9" | Montana fish & wildlife agency |
| September 8, 2023 | Rainbow Trout | 1,500 | 8.42" | Montana fish & wildlife agency |
| August 15, 2023 | Rainbow Trout | 500 | 10.19" | Montana fish & wildlife agency |
| August 15, 2023 | Rainbow Trout | 1,150 | 7.51" | Montana fish & wildlife agency |
| June 12, 2023 | Rainbow Trout | 1,692 | 7.91" | Montana fish & wildlife agency |
| May 16, 2023 | Rainbow Trout | 2,090 | 8.14" | Montana fish & wildlife agency |
| May 24, 2022 | Rainbow Trout | 1,500 | 7.58" | Montana fish & wildlife agency |
| September 7, 2021 | Rainbow Trout | 1,505 | 8.15" | Montana fish & wildlife agency |
| August 17, 2021 | Rainbow Trout | 1,500 | 7.62" | Montana fish & wildlife agency |
| June 25, 2021 | Rainbow Trout | 1,536 | 7.69" | Montana fish & wildlife agency |
| May 6, 2021 | Rainbow Trout | 1,501 | 6.65" | Montana fish & wildlife agency |
| September 9, 2020 | Rainbow Trout | 763 | 7.7" | Montana fish & wildlife agency |
| June 15, 2020 | Rainbow Trout | 1,501 | 8.12" | Montana fish & wildlife agency |
| June 15, 2020 | Rainbow Trout | 100 | 13.48" | Montana fish & wildlife agency |
| May 12, 2020 | Rainbow Trout | 100 | 12.57" | Montana fish & wildlife agency |
| May 12, 2020 | Rainbow Trout | 1,491 | 7.54" | Montana fish & wildlife agency |
| August 13, 2019 | Rainbow Trout | 30 | 9.68" | Montana fish & wildlife agency |
| August 13, 2019 | Rainbow Trout | 1,497 | 7.32" | Montana fish & wildlife agency |
| July 12, 2019 | Rainbow Trout | 1,500 | 7.16" | Montana fish & wildlife agency |
| June 4, 2019 | Rainbow Trout | 1,500 | 6.7" | Montana fish & wildlife agency |
| May 17, 2019 | Rainbow Trout | 1,500 | 7.3" | Montana fish & wildlife agency |
| August 27, 2018 | Rainbow Trout | 1,545 | 7.4" | Montana fish & wildlife agency |
| July 25, 2018 | Rainbow Trout | 1,513 | 7.69" | Montana fish & wildlife agency |
| June 19, 2018 | Rainbow Trout | 1,510 | 7.03" | Montana fish & wildlife agency |
| May 16, 2018 | Rainbow Trout | 752 | 7.32" | Montana fish & wildlife agency |
| August 30, 2017 | Rainbow Trout | 1,516 | 10.39" | Montana fish & wildlife agency |
| July 19, 2017 | Rainbow Trout | 1,511 | 8.52" | Montana fish & wildlife agency |
| June 16, 2017 | Rainbow Trout | 1,508 | 8.42" | Montana fish & wildlife agency |
| May 8, 2017 | Rainbow Trout | 1,498 | 6.63" | Montana fish & wildlife agency |
| August 18, 2016 | Rainbow Trout | 1,499 | 10.12" | Montana fish & wildlife agency |
| July 25, 2016 | Rainbow Trout | 1,513 | 9.19" | Montana fish & wildlife agency |
| June 21, 2016 | Rainbow Trout | 1,530 | 7.75" | Montana fish & wildlife agency |
| April 22, 2016 | Rainbow Trout | 1,502 | 8.19" | Montana fish & wildlife agency |
| August 19, 2015 | Rainbow Trout | 955 | 9.02" | Montana fish & wildlife agency |
| August 19, 2015 | Rainbow Trout | 546 | 9.71" | Montana fish & wildlife agency |
| July 20, 2015 | Rainbow Trout | 1,500 | 8.37" | Montana fish & wildlife agency |
| June 23, 2015 | Rainbow Trout | 1,518 | 7.13" | Montana fish & wildlife agency |
| May 12, 2015 | Rainbow Trout | 1,505 | 7.46" | Montana fish & wildlife agency |
| August 20, 2014 | Rainbow Trout | 1,510 | 8.09" | Montana fish & wildlife agency |
| July 21, 2014 | Rainbow Trout | 1,503 | 8.27" | Montana fish & wildlife agency |
Showing 50 of 258 stocking records.
Frequently asked
When was Greenough Lake last stocked?
According to Montana fish & wildlife agency, Greenough Lake was last stocked June 10, 2026 with Rainbow Trout.
What fish species are stocked in Greenough Lake?
Greenough Lake is stocked with Rainbow Trout and Brook Trout.
What time of year is Greenough Lake stocked?
Greenough Lake is typically stocked in summer, most often in June.
How often is Greenough Lake stocked?
Greenough Lake has been stocked about 3 times a year — 258 recorded stockings between 1933 and 2026.
How many fish have been stocked in Greenough Lake?
About 328,143 fish have been stocked in Greenough Lake across 258 recorded events since 1933, per Montana fish & wildlife agency.
What size are the fish stocked in Greenough Lake?
Fish stocked in Greenough Lake average about 8.8 inches, based on the sizes the agency reported.
Do you need a fishing license to fish Greenough Lake?
Yes, all anglers age 16 and older generally need a valid Montana freshwater fishing license. Always review current regulations from Montana fish & wildlife agency for site-specific rules, bag limits, or stamps.
How do you catch stocked trout in Greenough Lake?
Freshly stocked trout in Greenough Lake typically respond well to floating dough bait (such as PowerBait) floated 12–18 inches off bottom on light 4–6 lb leader, live nightcrawlers under a bobber, and small inline spinners or spoons retrieved along shorelines and drop-offs.