Thundercloud Reservoir Fish Stocking
Montana · 1975–2012 on record
According to Montana fish & wildlife agency, Thundercloud Reservoir was last stocked May 16, 2012 with Rainbow Trout. Thundercloud Reservoir has 13 stocking records on file, spanning 1975–2012, with about 11,056 fish stocked over that period.
When Thundercloud Reservoir is stocked
Thundercloud Reservoir is typically stocked in spring, most often in April — 7 stocking events in that peak month.
Angler's Field Guide
Fishing Tips & Stocking Guide for Thundercloud Reservoir
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 Thundercloud Reservoir, 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 Thundercloud Reservoir was last stocked May 16, 2012, 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 Thundercloud Reservoir:
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.
Bass & Panfish Approach
Target visible structure such as docks, weed lines, and fallen trees. Small 1/32 to 1/16 oz jig heads with soft plastic grubs or live worms under a float work well for crappie and bluegill; soft plastic worms or spinnerbaits work well for bass.
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.
Largemouth Bass Profile Tips
The centerpiece of American bass fishing culture, taken on everything from topwater lures to soft plastics and live bait.
Recommended Tackle for Thundercloud Reservoir
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.
Gary Yamamoto 5-inch Custom Senko Stickbaits
The heavy salt-impregnated plastic produces a unique horizontal shimmy on the fall around weed beds, docks, and submerged timber.
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 Thundercloud Reservoir, freshest activity first.
Drag Creek Reservoir
6 mi4 species · 40 records
Last stocked September 2025
Dry Lake Reservoir
15 mi2 species · 10 records
Last stocked September 2025
Holland Reservoir
8 mi1 species · 8 records
Last stocked August 2025
Whisker Reservoir
9 mi1 species · 11 records
Last stocked August 2024
Bubs Reservoir
6 mi1 species · 8 records
Last stocked August 2023
Deer Coulee Reservoir
10 mi1 species · 3 records
Last stocked June 2021
Stocking history
Most recent stockings first. Dates shown at the precision the agency reported.
| Date | Species | Number | Size | Source |
|---|---|---|---|---|
| May 16, 2012 | Rainbow Trout | 800 | 2.71" | Montana fish & wildlife agency |
| June 22, 2011 | Rainbow Trout | 800 | 3.6" | Montana fish & wildlife agency |
| May 18, 2010 | Rainbow Trout | 800 | 3.59" | Montana fish & wildlife agency |
| May 20, 2009 | Rainbow Trout | 812 | 4" | Montana fish & wildlife agency |
| April 28, 2008 | Rainbow Trout | 850 | 3.28" | Montana fish & wildlife agency |
| April 16, 2007 | Rainbow Trout | 831 | 3.21" | Montana fish & wildlife agency |
| April 14, 2006 | Rainbow Trout | 659 | 3.08" | Montana fish & wildlife agency |
| April 14, 2006 | Rainbow Trout | 218 | 3.06" | Montana fish & wildlife agency |
Show 5 more stocking records →
| Date | Species | Number | Size | Source |
|---|---|---|---|---|
| April 12, 2005 | Rainbow Trout | 813 | 2.85" | Montana fish & wildlife agency |
| April 7, 2004 | Rainbow Trout | 870 | 2.58" | Montana fish & wildlife agency |
| April 9, 2003 | Rainbow Trout | 803 | 3.1" | Montana fish & wildlife agency |
| July 19, 1982 | Largemouth Bass | 800 | 2" | Montana fish & wildlife agency |
| July 15, 1975 | Largemouth Bass | 2,000 | 1" | Montana fish & wildlife agency |
Frequently asked
When was Thundercloud Reservoir last stocked?
According to Montana fish & wildlife agency, Thundercloud Reservoir was last stocked May 16, 2012 with Rainbow Trout.
What fish species are stocked in Thundercloud Reservoir?
Thundercloud Reservoir is stocked with Rainbow Trout and Largemouth Bass.
What time of year is Thundercloud Reservoir stocked?
Thundercloud Reservoir is typically stocked in spring, most often in April.
How often is Thundercloud Reservoir stocked?
Thundercloud Reservoir is stocked intermittently — 13 recorded stockings between 1975 and 2012.
How many fish have been stocked in Thundercloud Reservoir?
About 11,056 fish have been stocked in Thundercloud Reservoir across 13 recorded events since 1975, per Montana fish & wildlife agency.
What size are the fish stocked in Thundercloud Reservoir?
Fish stocked in Thundercloud Reservoir average about 2.9 inches, based on the sizes the agency reported.
Do you need a fishing license to fish Thundercloud Reservoir?
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 Thundercloud Reservoir?
Freshly stocked trout in Thundercloud Reservoir 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.