Upper Stillwater Reservoir
Today’s report
Upper Stillwater Reservoir is a fair bet today. The reservoir is 46% full, well below the usual 52% for this time of year, and rising over the last month. The DWR last stocked brook trout (761 fish) on August 12. Overnight's forecast: partly cloudy, 37°F.
- calm, fishable weather
Current conditions
Stocking
Last stocked Aug 12, 2026 — brook trout (761 fish).
| Date | Species | Quantity | Avg length |
|---|---|---|---|
| Aug 12, 2026 | brook trout | 761 | 5.12" |
| Jul 16, 2026 | brook trout | 7,319 | 3.45" |
| Jun 2, 2026 | brook trout | 3,004 | 3.12" |
| Jun 13, 2025 | brook trout | 3,001 | 3.63" |
| Aug 19, 2024 | brook trout | 3,036 | 4.67" |
| Jul 19, 2023 | brook trout | 3,004 | 3.09" |
Best time to fish Upper Stillwater Reservoir
The DWR has stocked Upper Stillwater Reservoir 6 times over the last 2 seasons, and 100% of those plants landed in June through August — the freshest fish and the easiest bite usually follow within a week or two of a stocking.
Species
Location
Nearby waters (within ~25 mi):
Regulations
No water-specific rules listed for this water in the current Utah Fishing Guidebook — statewide general rules and daily limits apply (trout limit 4, combined). Verify in the current guidebook before you fish.