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
- Cove by Boat RampWarning
- North EndWarning
- Gunlock Reservoir shoreline NW 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 4 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. This Afternoon's forecast: slight chance showers and thunderstorms, 83°F, 17% chance of precip.
- Warning advisory posted (algal bloom) — it replaces the fishing rating until it’s lifted
- pool is low (~37% of capacity as of Sep 30)
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 CountyFairBaker ReservoirWashington CountyWarningPine Valley Reservoir — Pine Valley MtnWashington CountyFairQuail Creek ReservoirWashington CountyFairEnterprise Reservoir, LowerWashington CountyToughEnterprise Reservoir, UpperWashington CountyToughSand Hollow ReservoirWashington CountyFair
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
This Afternoon
83°F
Slight Chance Showers And Thunderstorms
17% precip
Tonight
58°F
Showers And Thunderstorms
100% precip
Sunday
72°F
Showers And Thunderstorms
98% precip
Sunday Night
53°F
Showers And Thunderstorms
97% precip
Columbus Day
63°F
Showers And Thunderstorms
97% precip
Monday Night
46°F
Showers And Thunderstorms
95% precip
Tuesday
60°F
Showers And Thunderstorms Likely
71% precip
Tuesday Night
42°F
Partly Cloudy
Wednesday
66°F
Sunny
Wednesday Night
45°F
Clear