reservoir
Gunlock Reservoir
Warningadvisory
37%fullas of Sep 30 · 3,832 of 10,400 af
Water quality · Warning advisory
Toxic algae bloom at Gunlock
- 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
Where · issued Aug 17
- South Marina Boat RampWarning
- Northwest Rock PointWarning
- Beach AccessWarning
Empty37% on Sep 3052% typical for end of SepFull pool
Today’s report
Gunlock 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 37% full as of September 30 (the operator posts a month-end level, not daily), well below the usual 52% for this time of year, and drawing down over the last month. Today's forecast: sunny, 73°F.
- Warning advisory posted (algal bloom) — it replaces the fishing rating until it’s lifted
- pool is low (~37% of capacity as of Sep 30)
- calm, fishable weather
Current conditions
37% full
Level · Sep 30 (−10 pts / 30d)
3,832af
Storage (-21.5% / 30d)
Species
Location
Nearby waters (within ~25 mi):
Sand Cove Reservoir, UpperWashington CountyGoodBaker ReservoirWashington CountyWarningPine Valley Reservoir — Pine Valley MtnWashington CountyFairQuail Creek ReservoirWashington CountyFairEnterprise Reservoir, LowerWashington CountyToughEnterprise Reservoir, UpperWashington CountyToughSand Hollow ReservoirWashington CountyGood
Regulations
- Limit 100 black crappie.
- No limit on smallmouth bass. Anglers must not release any smallmouth bass they catch. All smallmouth bass must be immediately killed.
- Limit 6 largemouth bass of any size
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.
This week’s weather
Today
73°F
Sunny
Tonight
54°F
Mostly Cloudy
Sunday
69°F
Mostly Cloudy
Sunday Night
53°F
Partly Cloudy
Monday
70°F
Mostly Sunny
Monday Night
54°F
Partly Cloudy then Slight Chance Light Rain
Tuesday
69°F
Slight Chance Light Rain then Chance Showers And Thunderstorms
29% precip
Tuesday Night
53°F
Chance Showers And Thunderstorms then Chance Light Rain
46% precip
Wednesday
68°F
Showers And Thunderstorms Likely
59% precip
Wednesday Night
51°F
Showers And Thunderstorms then Light Rain
81% precip