Upper Stillwater Reservoir Fish Stocking
DUCHESNE County, Utah · 1990–2026 on record
According to Utah DWR — Fish Stocking Report, Upper Stillwater Reservoir was last stocked July 16, 2026 with Brook Trout. Upper Stillwater Reservoir has 34 stocking records on file, spanning 1990–2026, with about 113,703 fish stocked over that period.
When Upper Stillwater Reservoir is stocked
Upper Stillwater Reservoir is typically stocked in summer, most often in July — 12 stocking events in that peak month.
Nearby stocked waters
Other stocked waters near Upper Stillwater Reservoir, freshest activity first.
Horseshoe Lake Rc 38
4 miDUCHESNE County · 1 species · 13 records
Last stocked July 2026
Rudolph Lake No 1
4 miDUCHESNE County · 1 species · 13 records
Last stocked July 2026
Mid Lake
4 miDUCHESNE County · 1 species · 12 records
Last stocked July 2026
Rock Creek
4 miDUCHESNE County · 5 species · 146 records
Last stocked July 2026
Rock Creek S Fork
2 miDUCHESNE County · 1 species · 4 records
Last stocked September 2025
Docs Lake
3 miDUCHESNE County · 1 species · 11 records
Last stocked July 2025
Stocking history
Most recent stockings first. Dates shown at the precision the agency reported.
| Date | Species | Number | Size | Source |
|---|---|---|---|---|
| July 16, 2026 | Brook Trout | 7,319 | 3.45" | Utah DWR |
| June 2, 2026 | Brook Trout | 3,004 | 3.12" | Utah DWR |
| June 13, 2025 | Brook Trout | 3,001 | 3.63" | Utah DWR |
| August 19, 2024 | Brook Trout | 3,036 | 4.67" | Utah DWR |
| July 19, 2023 | Brook Trout | 3,004 | 3.09" | Utah DWR |
| July 29, 2020 | Brook Trout | 3,480 | 3.67" | Utah DWR |
| July 31, 2015 | Tiger Trout | 5,984 | 4.61" | Utah DWR |
| May 16, 2014 | Rainbow Trout | 848 | 9.21" | Utah DWR |
Show 26 more stocking records →
| Date | Species | Number | Size | Source |
|---|---|---|---|---|
| June 13, 1996 | Rainbow Trout | 909 | 9.08" | Utah DWR |
| May 30, 1996 | Rainbow Trout | 2,273 | 9.11" | Utah DWR |
| May 30, 1996 | Rainbow Trout | 2,273 | 9.11" | Utah DWR |
| May 30, 1996 | Rainbow Trout | 2,273 | 9.11" | Utah DWR |
| May 30, 1996 | Rainbow Trout | 2,273 | 9.11" | Utah DWR |
| July 7, 1995 | Rainbow Trout | 2,368 | 9.56" | Utah DWR |
| July 7, 1995 | Rainbow Trout | 1,110 | 9.56" | Utah DWR |
| July 7, 1995 | Rainbow Trout | 2,368 | 9.56" | Utah DWR |
| July 7, 1995 | Rainbow Trout | 2,368 | 9.56" | Utah DWR |
| May 20, 1994 | Rainbow Trout | 1,807 | 10.24" | Utah DWR |
| May 20, 1994 | Rainbow Trout | 1,757 | 10.24" | Utah DWR |
| May 20, 1994 | Rainbow Trout | 1,782 | 10.24" | Utah DWR |
| May 19, 1994 | Rainbow Trout | 1,715 | 10.32" | Utah DWR |
| May 19, 1994 | Rainbow Trout | 1,715 | 10.32" | Utah DWR |
| May 19, 1994 | Rainbow Trout | 1,715 | 10.32" | Utah DWR |
| June 15, 1993 | Rainbow Trout | 2,520 | 8.85" | Utah DWR |
| June 15, 1993 | Rainbow Trout | 2,520 | 8.85" | Utah DWR |
| June 14, 1993 | Rainbow Trout | 2,520 | 8.85" | Utah DWR |
| June 14, 1993 | Rainbow Trout | 2,520 | 8.85" | Utah DWR |
| July 8, 1992 | Rainbow Trout | 7,488 | 0" | Utah DWR |
| July 7, 1992 | Rainbow Trout | 7,125 | 0" | Utah DWR |
| July 3, 1991 | Rainbow Trout | 7,455 | 0" | Utah DWR |
| July 2, 1991 | Rainbow Trout | 7,683 | 0" | Utah DWR |
| June 5, 1991 | Rainbow Trout | 500 | 0" | Utah DWR |
| June 25, 1990 | Rainbow Trout | 7,492 | 0" | Utah DWR |
| June 22, 1990 | Rainbow Trout | 7,498 | 0" | Utah DWR |
Frequently asked
When was Upper Stillwater Reservoir last stocked?
According to Utah DWR — Fish Stocking Report, Upper Stillwater Reservoir was last stocked July 16, 2026 with Brook Trout.
What fish species are stocked in Upper Stillwater Reservoir?
Upper Stillwater Reservoir is stocked with Brook Trout, Tiger Trout, and Rainbow Trout.
What time of year is Upper Stillwater Reservoir stocked?
Upper Stillwater Reservoir is typically stocked in summer, most often in July.
How often is Upper Stillwater Reservoir stocked?
Upper Stillwater Reservoir is stocked intermittently — 34 recorded stockings between 1990 and 2026.
How many fish have been stocked in Upper Stillwater Reservoir?
About 113,703 fish have been stocked in Upper Stillwater Reservoir across 34 recorded events since 1990, per Utah fish & wildlife agency.
What size are the fish stocked in Upper Stillwater Reservoir?
Fish stocked in Upper Stillwater Reservoir average about 6.4 inches, based on the sizes the agency reported.