Upper Stillwater Reservoir Fish Stocking
DUCHESNE County, Utah · 1990–2026 on record
According to Utah DWR — Fish Stocking Report, Upper Stillwater Reservoir was last stocked July 16, 2026 with Brook Trout. Upper Stillwater Reservoir has 34 stocking records on file, spanning 1990–2026, with about 113,703 fish stocked over that period.
When Upper Stillwater Reservoir is stocked
Upper Stillwater Reservoir is typically stocked in summer, most often in July — 12 stocking events in that peak month.
Angler's Field Guide
Fishing Tips & Stocking Guide for Upper Stillwater Reservoir
Practical advice on fish behavior, recommended tackle, and state regulations for anglers fishing in DUCHESNE County, Utah.
Post-Plant Behavior & Timing
Hatchery-raised fish are conditioned to pelleted feed and open raceways. Following a release into Upper Stillwater 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 Upper Stillwater Reservoir was last stocked July 16, 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 Utah freshwater fishing license is required for anglers age 16 and older.Purchase Utah license online →
- •Official Rules & Limits: Bag limits, bait restrictions, and seasonal boundaries are set by Utah fish & wildlife agency.Official Utah 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 Stillwater 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.
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.
Tiger Trout Profile Tips
Known for hitting lures and flies aggressively; a favorite for anglers seeking a distinctive, hard-fighting stocked trout.
Recommended Tackle for Upper Stillwater 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.
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Nearby stocked waters
Other stocked waters near Upper Stillwater Reservoir, freshest activity first.
Horseshoe Lake Rc 38
4 miDUCHESNE County · 1 species · 13 records
Last stocked July 2026
Rudolph Lake No 1
4 miDUCHESNE County · 1 species · 13 records
Last stocked July 2026
Mid Lake
4 miDUCHESNE County · 1 species · 12 records
Last stocked July 2026
Rock Creek
4 miDUCHESNE County · 5 species · 146 records
Last stocked July 2026
Rock Creek S Fork
2 miDUCHESNE County · 1 species · 4 records
Last stocked September 2025
Docs Lake
3 miDUCHESNE County · 1 species · 11 records
Last stocked July 2025
Stocking history
Most recent stockings first. Dates shown at the precision the agency reported.
| Date | Species | Number | Size | Source |
|---|---|---|---|---|
| July 16, 2026 | Brook Trout | 7,319 | 3.45" | Utah DWR |
| June 2, 2026 | Brook Trout | 3,004 | 3.12" | Utah DWR |
| June 13, 2025 | Brook Trout | 3,001 | 3.63" | Utah DWR |
| August 19, 2024 | Brook Trout | 3,036 | 4.67" | Utah DWR |
| July 19, 2023 | Brook Trout | 3,004 | 3.09" | Utah DWR |
| July 29, 2020 | Brook Trout | 3,480 | 3.67" | Utah DWR |
| July 31, 2015 | Tiger Trout | 5,984 | 4.61" | Utah DWR |
| May 16, 2014 | Rainbow Trout | 848 | 9.21" | Utah DWR |
Show 26 more stocking records →
| Date | Species | Number | Size | Source |
|---|---|---|---|---|
| June 13, 1996 | Rainbow Trout | 909 | 9.08" | Utah DWR |
| May 30, 1996 | Rainbow Trout | 2,273 | 9.11" | Utah DWR |
| May 30, 1996 | Rainbow Trout | 2,273 | 9.11" | Utah DWR |
| May 30, 1996 | Rainbow Trout | 2,273 | 9.11" | Utah DWR |
| May 30, 1996 | Rainbow Trout | 2,273 | 9.11" | Utah DWR |
| July 7, 1995 | Rainbow Trout | 2,368 | 9.56" | Utah DWR |
| July 7, 1995 | Rainbow Trout | 1,110 | 9.56" | Utah DWR |
| July 7, 1995 | Rainbow Trout | 2,368 | 9.56" | Utah DWR |
| July 7, 1995 | Rainbow Trout | 2,368 | 9.56" | Utah DWR |
| May 20, 1994 | Rainbow Trout | 1,807 | 10.24" | Utah DWR |
| May 20, 1994 | Rainbow Trout | 1,757 | 10.24" | Utah DWR |
| May 20, 1994 | Rainbow Trout | 1,782 | 10.24" | Utah DWR |
| May 19, 1994 | Rainbow Trout | 1,715 | 10.32" | Utah DWR |
| May 19, 1994 | Rainbow Trout | 1,715 | 10.32" | Utah DWR |
| May 19, 1994 | Rainbow Trout | 1,715 | 10.32" | Utah DWR |
| June 15, 1993 | Rainbow Trout | 2,520 | 8.85" | Utah DWR |
| June 15, 1993 | Rainbow Trout | 2,520 | 8.85" | Utah DWR |
| June 14, 1993 | Rainbow Trout | 2,520 | 8.85" | Utah DWR |
| June 14, 1993 | Rainbow Trout | 2,520 | 8.85" | Utah DWR |
| July 8, 1992 | Rainbow Trout | 7,488 | 0" | Utah DWR |
| July 7, 1992 | Rainbow Trout | 7,125 | 0" | Utah DWR |
| July 3, 1991 | Rainbow Trout | 7,455 | 0" | Utah DWR |
| July 2, 1991 | Rainbow Trout | 7,683 | 0" | Utah DWR |
| June 5, 1991 | Rainbow Trout | 500 | 0" | Utah DWR |
| June 25, 1990 | Rainbow Trout | 7,492 | 0" | Utah DWR |
| June 22, 1990 | Rainbow Trout | 7,498 | 0" | Utah DWR |
Frequently asked
When was Upper Stillwater Reservoir last stocked?
According to Utah DWR — Fish Stocking Report, Upper Stillwater Reservoir was last stocked July 16, 2026 with Brook Trout.
What fish species are stocked in Upper Stillwater Reservoir?
Upper Stillwater Reservoir is stocked with Brook Trout, Tiger Trout, and Rainbow Trout.
What time of year is Upper Stillwater Reservoir stocked?
Upper Stillwater Reservoir is typically stocked in summer, most often in July.
How often is Upper Stillwater Reservoir stocked?
Upper Stillwater Reservoir is stocked intermittently — 34 recorded stockings between 1990 and 2026.
How many fish have been stocked in Upper Stillwater Reservoir?
About 113,703 fish have been stocked in Upper Stillwater Reservoir across 34 recorded events since 1990, per Utah fish & wildlife agency.
What size are the fish stocked in Upper Stillwater Reservoir?
Fish stocked in Upper Stillwater Reservoir average about 6.4 inches, based on the sizes the agency reported.
Do you need a fishing license to fish Upper Stillwater Reservoir?
Yes, all anglers age 16 and older generally need a valid Utah freshwater fishing license. Always review current regulations from Utah fish & wildlife agency for site-specific rules, bag limits, or stamps.
How do you catch stocked trout in Upper Stillwater Reservoir?
Freshly stocked trout in Upper Stillwater 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.