Big Sandwash Reservoir
Duchesne County · Northeastern region
Current conditions
Stocking
Last stocked Jul 16, 2026 — walleye (425 fish).
| Date | Species | Quantity | Avg length |
|---|---|---|---|
| Jul 16, 2026 | walleye | 425 | 4.58" |
| May 21, 2026 | rainbow | 400 | 13.1" |
| May 19, 2026 | rainbow | 948 | 11.75" |
| May 18, 2026 | rainbow | 1,120 | 11.6" |
| Oct 29, 2025 | cutbow ctbl*rtwv | 7,453 | 4.55" |
| Jun 1, 2025 | rainbow | 4,913 | 9.6" |
| May 24, 2025 | rainbow | 4,960 | 9.69" |
| May 17, 2025 | rainbow | 3,169 | 9.54" |
Species
cutbow troutrainbow troutwalleye
Forecast
This Afternoon
87°F
Slight Chance Showers And Thunderstorms
19% precip
Tonight
59°F
Partly Cloudy
Thursday
89°F
Mostly Sunny then Slight Chance Showers And Thunderstorms
20% precip
Thursday Night
59°F
Partly Cloudy
Friday
91°F
Mostly Sunny
Friday Night
61°F
Slight Chance Showers And Thunderstorms
17% precip
Saturday
86°F
Partly Sunny then Chance Showers And Thunderstorms
31% precip
Saturday Night
57°F
Chance Showers And Thunderstorms
32% precip