Matt Warner Reservoir
Toxic algae bloom at Matt Warner
- 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
Matt Warner 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 brown trout (3,929 fish) on May 27. This Afternoon's forecast: sunny, 53°F.
- Warning advisory posted (algal bloom) — it replaces the fishing rating until it’s lifted
- calm, fishable weather
Current conditions
Stocking
Last stocked May 27, 2026 — brown trout (3,929 fish).
| Date | Species | Quantity | Avg length |
|---|---|---|---|
| May 27, 2026 | brown trout | 3,929 | 3.12" |
| Jun 30, 2025 | tiger trout (brown × brook hybrid) | 2,474 | 4.32" |
| May 30, 2025 | rainbow trout | 33,042 | 2.67" |
| May 18, 2025 | grass carp (sterile) | 380 | 6.75" |
| May 13, 2025 | brown trout | 5,747 | 2.96" |
| May 13, 2025 | rainbow trout | 1,724 | 3.96" |
| May 12, 2025 | rainbow trout | 4,099 | 9.28" |
| May 8, 2025 | rainbow trout | 2,904 | 9.16" |
Best time to fish Matt Warner Reservoir
The DWR has stocked Matt Warner Reservoir 29 times over the last 6 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
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.