Lost Creek Reservoir
Toxic algae bloom at Lost Creek
- 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
- Dam Outflow CampgroundWarning
- Southeast ShoreWarning
- State Park Boat RampWarning
Today’s report
Lost Creek Reservoir is under a Warning advisory today. The advisory is for a harmful algal bloom at 3 monitored sites and replaces the fishing rating until it’s lifted — keep dogs out of the water and check habs.utah.gov before you go. The reservoir is 27% full, well below the usual 61% for this time of year, and drawing down over the last month. The DWR last stocked splake (lake × brook trout hybrid) (3,527 fish) on June 24. Today's forecast: mostly sunny, 77°F.
- Warning advisory posted (algal bloom) — it replaces the fishing rating until it’s lifted
- pool is low (~27% of capacity)
- calm, fishable weather
Current conditions
Stocking
Last stocked Jun 24, 2026 — splake (lake × brook trout hybrid) (3,527 fish).
| Date | Species | Quantity | Avg length |
|---|---|---|---|
| Jun 24, 2026 | splake (lake × brook trout hybrid) | 3,527 | 2.71" |
| May 19, 2026 | rainbow trout | 427 | 11.73" |
| May 18, 2026 | rainbow trout | 1,395 | 11.73" |
| May 11, 2026 | tiger trout (brown × brook hybrid) | 2,744 | 9.26" |
| Apr 27, 2026 | cutthroat trout | 2,900 | 10.03" |
| Apr 27, 2026 | cutthroat trout | 3,205 | 10.03" |
| Apr 27, 2026 | cutthroat trout | 7,540 | 10.03" |
| Apr 22, 2026 | kokanee salmon | 22,554 | 2.95" |
Best time to fish Lost Creek Reservoir
The DWR has stocked Lost Creek Reservoir 48 times over the last 5 seasons, and 90% 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
Location
Nearby waters (within ~25 mi):
Regulations
- Limit 4 trout or kokanee salmon (a combined total). Kokanee salmon of any size may be harvested as part of the limit.
- No more than 3 trout may be under 15 inches.
- No more than 1 trout may be over 22 inches.
- All trout between 15 and 22 inches must be immediately released.
- Trout and salmon may not be filleted, and their heads or tails may not be removed in the field or in transit.
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.