Dewey Lake Fish Stocking
Montana · 1955–1985 on record
According to Montana fish & wildlife agency, Dewey Lake was last stocked July 22, 1985 with Cutthroat Trout. Dewey Lake has 4 stocking records on file, spanning 1955–1985, with about 22,254 fish stocked over that period.
Angler's Field Guide
Fishing Tips & Stocking Guide for Dewey 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 Dewey 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 Dewey Lake was last stocked July 22, 1985, 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 Dewey 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.
Golden Trout Profile Tips
A bucket-list fish for many western anglers, often requiring a backcountry hike to reach stocked alpine lakes.
Recommended Tackle for Dewey 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.
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Nearby stocked waters
Other stocked waters near Dewey Lake, freshest activity first.
Basin Lake
3 mi2 species · 9 records
Last stocked October 2025
Lake Of The Winds
3 mi2 species · 8 records
Last stocked August 2025
Moon Lake
3 mi2 species · 22 records
Last stocked August 2023
Gallery Lake
2 mi2 species · 4 records
Last stocked September 2022
Lake Of The Clouds
3 mi1 species · 9 records
Last stocked July 2020
Little Scat Lake
2 mi1 species · 2 records
Last stocked September 2017
Stocking history
Most recent stockings first. Dates shown at the precision the agency reported.
| Date | Species | Number | Size | Source |
|---|---|---|---|---|
| July 22, 1985 | Cutthroat Trout | 3,706 | 2" | Montana fish & wildlife agency |
| August 5, 1981 | Cutthroat Trout | 3,738 | 2" | Montana fish & wildlife agency |
| July 24, 1968 | Cutthroat Trout | 10,010 | 3" | Montana fish & wildlife agency |
| August 29, 1955 | Golden Trout | 4,800 | 1" | Montana fish & wildlife agency |
Frequently asked
When was Dewey Lake last stocked?
According to Montana fish & wildlife agency, Dewey Lake was last stocked July 22, 1985 with Cutthroat Trout.
What fish species are stocked in Dewey Lake?
Dewey Lake is stocked with Cutthroat Trout and Golden Trout.
How often is Dewey Lake stocked?
Dewey Lake is stocked intermittently — 4 recorded stockings between 1955 and 1985.
How many fish have been stocked in Dewey Lake?
About 22,254 fish have been stocked in Dewey Lake across 4 recorded events since 1955, per Montana fish & wildlife agency.
What size are the fish stocked in Dewey Lake?
Fish stocked in Dewey Lake average about 2.0 inches, based on the sizes the agency reported.
Do you need a fishing license to fish Dewey 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 Dewey Lake?
Freshly stocked trout in Dewey 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.