Upper Twin Lake Fish Stocking
Montana · 1934–2025 on record
According to Montana fish & wildlife agency, Upper Twin Lake was last stocked September 30, 2025 with Cutthroat Trout. Upper Twin Lake has 14 stocking records on file, spanning 1934–2025, with about 88,287 fish stocked over that period.
When Upper Twin Lake is stocked
Upper Twin Lake is typically stocked in fall, most often in September — 8 stocking events in that peak month.
By species
Angler's Field Guide
Fishing Tips & Stocking Guide for Upper Twin 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 Upper Twin 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 Upper Twin Lake was last stocked September 30, 2025, 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 Upper Twin 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.
Cutthroat Trout Profile Tips
Known for being relatively easy to catch on dry flies, making it a favorite of western fly anglers; many subspecies are managed under catch-and-release rules to protect native populations.
Recommended Tackle for Upper Twin 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 Upper Twin Lake, freshest activity first.
Lake Como
9 mi5 species · 384 records
Last stocked June 2026
Stafford Kid's Pond
4 mi1 species · 29 records
Last stocked May 2026
Heironymous Pond
9 mi1 species · 38 records
Last stocked May 2026
Upper Camas Lake
8 mi1 species · 10 records
Last stocked August 1977
Skalkaho Creek
6 mi2 species · 119 records
Last stocked July 1971
Kenck Lake
8 mi2 species · 8 records
Last stocked August 1956
Stocking history
Most recent stockings first. Dates shown at the precision the agency reported.
| Date | Species | Number | Size | Source |
|---|---|---|---|---|
| September 30, 2025 | Cutthroat Trout | 4,000 | 2.23" | Montana fish & wildlife agency |
| October 3, 2024 | Cutthroat Trout | 4,000 | 1.85" | Montana fish & wildlife agency |
| September 28, 2023 | Cutthroat Trout | 3,600 | 2.06" | Montana fish & wildlife agency |
| September 2, 2022 | Cutthroat Trout | 4,000 | 2.24" | Montana fish & wildlife agency |
| September 1, 2021 | Cutthroat Trout | 4,000 | 2.35" | Montana fish & wildlife agency |
| August 15, 2019 | Cutthroat Trout | 4,000 | 2.1" | Montana fish & wildlife agency |
| August 29, 2018 | Cutthroat Trout | 3,600 | 2.43" | Montana fish & wildlife agency |
| September 28, 2017 | Cutthroat Trout | 4,012 | 2.3" | Montana fish & wildlife agency |
Show 6 more stocking records →
| Date | Species | Number | Size | Source |
|---|---|---|---|---|
| September 1, 2016 | Cutthroat Trout | 1,500 | 6.88" | Montana fish & wildlife agency |
| August 12, 2015 | Cutthroat Trout | 4,000 | 1.7" | Montana fish & wildlife agency |
| August 19, 1963 | Cutthroat Trout | 535 | 2" | Montana fish & wildlife agency |
| September 7, 1961 | Cutthroat Trout | 5,040 | 2" | Montana fish & wildlife agency |
| September 13, 1959 | Cutthroat Trout | 10,000 | 1" | Montana fish & wildlife agency |
| August 17, 1934 | Cutthroat Trout | 36,000 | 0 | Montana fish & wildlife agency |
Frequently asked
When was Upper Twin Lake last stocked?
According to Montana fish & wildlife agency, Upper Twin Lake was last stocked September 30, 2025 with Cutthroat Trout.
What fish species are stocked in Upper Twin Lake?
Upper Twin Lake is stocked with Cutthroat Trout.
What time of year is Upper Twin Lake stocked?
Upper Twin Lake is typically stocked in fall, most often in September.
How often is Upper Twin Lake stocked?
Upper Twin Lake is stocked intermittently — 14 recorded stockings between 1934 and 2025.
How many fish have been stocked in Upper Twin Lake?
About 88,287 fish have been stocked in Upper Twin Lake across 14 recorded events since 1934, per Montana fish & wildlife agency.
What size are the fish stocked in Upper Twin Lake?
Fish stocked in Upper Twin Lake average about 2.4 inches, based on the sizes the agency reported.
Do you need a fishing license to fish Upper Twin 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 Upper Twin Lake?
Freshly stocked trout in Upper Twin 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.