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Duchesne County

Big Sandwash Reservoir

Utah DWR logged 4 trout stocking dates at Big Sandwash Reservoir in 2026 so far, 15,671 fish in all. The latest was on Oct 28, 2026. Utah DWR lists it as “Big Sandwash Res”.

Utah DWR data pulled . Latest record in the Utah DWR data for any water: Nov 4, 2026.

A lake with trees and reflection
Photo: AlainAudet, Pixabay License, Pixabay

Big Sandwash Reservoir in numbers

fish stocked in 2026, through Nov 6
15,671
by the same date in 2025
20,495
in all of 2025
20,495
Stocking log

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.

Last stocked, Oct 28, 20269,239Rainbow trout, avg 10.62 in; Cutbow (cutthroat × rainbow), avg 8.46 in
2026 · 15,671 fish on 4 dates
DateSpeciesFishAvg. length
Oct 28Rainbow trout5,499 fish5,49910.62 in
Oct 28Cutbow (cutthroat × rainbow)3,740 fish3,7408.46 in
May 21Rainbow trout400 fish40013.1 in
May 19Rainbow trout948 fish94811.75 in
May 19Rainbow trout948 fish94811.75 in
May 19Rainbow trout948 fish94811.75 in
May 19Rainbow trout948 fish94811.75 in
May 18Rainbow trout1,120 fish1,12011.6 in
May 18Rainbow trout1,120 fish1,12011.6 in
2025 · 20,495 fish on 4 dates
DateSpeciesFishAvg. length
Oct 29Cutbow (cutthroat × rainbow)7,453 fish7,4534.55 in
Jun 1Rainbow trout4,913 fish4,9139.6 in
May 24Rainbow trout4,960 fish4,9609.69 in
May 17Rainbow trout3,169 fish3,1699.54 in
Every year since 2020
YearStocking datesFish
2026415,671
2025420,495
2024421,857
2023311,676
2022311,953
2021211,463
2020518,222
2020 – 2026

Trout stocked each year

2026 is outlined because the year is not over. The tallest full year is yellow.

  1. 18k2020: 18,222 fish
  2. 11k2021: 11,463 fish
  3. 12k2022: 11,953 fish
  4. 12k2023: 11,676 fish
  5. 22k2024: 21,857 fish
  6. 20k2025: 20,495 fish
  7. 16k2026: 15,671 fish

What is stocked here

All records since 2020
SpeciesFishShare
Rainbow trout97,12987%
Cutbow (cutthroat × rainbow)11,19310%
Tiger trout3,0153%

Where it is

Utah trout stockingAll Duchesne County watersRecently stocked in Utah

No single map point is given for this water in the USGS names database, so no map is shown.

Also in Duchesne County: Starvation Reservoir, Butterfly Lake, Mirror Lake, Pass Lake, Moosehorn Lake, Moon Lake, Rock Creek, North Fork Duchesne River.

Source: DWR fish stocking report, Utah Division of Wildlife Resources. Pulled . Check the agency and the current fishing rules before you go.