Upper Stillwater Reservoir
Utah DWR logged 3 trout stocking dates at Upper Stillwater Reservoir in 2026 so far, 11,084 fish in all. The latest was on Aug 12, 2026. Utah DWR lists it as “Upper Stillwater Res”.
Utah DWR data pulled . Latest record in the Utah DWR data for any water: Nov 4, 2026.
Upper Stillwater Reservoir in numbers
- fish stocked in 2026, through Nov 6
- 11,084
- by the same date in 2025
- 3,001
- in all of 2025
- 3,001
Every stocking record
Counts include small fish (fingerlings) as well as catchable trout; the average length tells them apart. Every trout release Utah DWR lists for this water in the last two years, newest first, then yearly totals since 2020. Average length is the figure DWR gives for each batch.
| Date | Species | Fish | Avg. length |
|---|---|---|---|
| Aug 12 | Brook trout761 fish | 761 | 5.12 in |
| Jul 16 | Brook trout7,319 fish | 7,319 | 3.45 in |
| Jun 2 | Brook trout3,004 fish | 3,004 | 3.12 in |
| Date | Species | Fish | Avg. length |
|---|---|---|---|
| Jun 13 | Brook trout3,001 fish | 3,001 | 3.63 in |
| Year | Stocking dates | Fish |
|---|---|---|
| 2026 | 3 | 11,084 |
| 2025 | 1 | 3,001 |
| 2024 | 1 | 3,036 |
| 2023 | 1 | 3,004 |
| 2020 | 1 | 3,480 |
Trout stocked each year
2026 is outlined because the year is not over. The tallest full year is yellow.
What is stocked here
| Species | Fish | Share |
|---|---|---|
| Brook trout | 23,605 | 100% |
Map point 40.5690, -110.7017: the USGS Geographic Names Information System point for this reservoir (feature 2747038). It marks the water, not a parking lot or a boat launch.
Closest waters on this site
Straight-line distance between USGS map points, not driving distance.
Also in Duchesne County: Starvation Reservoir, Butterfly Lake, Mirror Lake, Pass Lake, Moosehorn Lake, Big Sandwash Reservoir, Moon Lake, Rock Creek.
Source: DWR fish stocking report, Utah Division of Wildlife Resources. Pulled . Check the agency and the current fishing rules before you go.
Near Upper Stillwater Reservoir
Boat access, bait shops, rentals and places to stay within 10 miles. Distances are straight lines from the map point of the water, not driving distance.
Lodging
1 listed- Defa's Dude Ranchcabins · Duchesne County9.3 mi
Businesses: Overture Maps Foundation open places data (release 2026-10-21.0, pulled 2026-11-06), from the businesses’ public listings. We have not visited them and do not rank them. Hours and services change, so call ahead.