Calder Reservoir
Uintah County · Northeastern region
Toxic algae bloom at Calder
- Keep dogs out of the water — blooms can be deadly for them
- Don’t swim, and steer clear of scum when wading or boating
- Don’t drink the water
- Keeping fish? Discard the guts and rinse fillets in clean water
Today’s report
Calder Reservoir is under a Warning advisory today. The advisory is for a harmful algal bloom at 1 monitored site and replaces the fishing rating until it’s lifted — keep dogs out of the water and check habs.utah.gov before you go. The DWR last stocked tiger trout (brown × brook hybrid) (1,473 fish) on June 30, 2025.
- Warning advisory posted (algal bloom) — it replaces the fishing rating until it’s lifted
Current conditions
Stocking
Last stocked Jun 30, 2025 — tiger trout (brown × brook hybrid) (1,473 fish).
| Date | Species | Quantity | Avg length |
|---|---|---|---|
| Jun 30, 2025 | tiger trout (brown × brook hybrid) | 1,473 | 4.67" |
| May 30, 2025 | cutthroat trout | 231 | 4.89" |
| May 30, 2025 | cutthroat trout | 270 | 5.64" |
| May 30, 2025 | rainbow trout | 5,602 | 2.67" |
| May 18, 2025 | grass carp (sterile) | 145 | 6.75" |
| May 13, 2025 | brown trout | 997 | 2.96" |
| May 12, 2025 | rainbow trout | 998 | 9.28" |
| Jun 3, 2024 | cutthroat trout | 501 | 5.71" |
Best time to fish Calder Reservoir
The DWR has stocked Calder Reservoir 22 times over the last 4 seasons, and 100% of those plants landed in April through June — the freshest fish and the easiest bite usually follow within a week or two of a stocking.
Species
Regulations
- Limit 1 trout over 22 inches.
- All trout 22 inches or smaller must be immediately released.
- Artificial flies and lures only.
Special rules from the 2026 Utah Fishing Guidebook. Statewide daily limits apply to anything not listed. Rules change — always verify in the current guidebook before you fish.