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Duchesne County

Butterfly Lake

Utah DWR logged 15 trout stocking dates at Butterfly Lake in 2026 so far, 4,993 fish in all. The latest was on Sep 22, 2026. Utah DWR lists it as “Butterfly L Z-1”.

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

Butterfly Lake in numbers

fish stocked in 2026, through Nov 5
4,993
by the same date in 2025
5,876
in all of 2025
5,876
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 2019. Average length is the figure DWR gives for each batch.

Last stocked, Sep 22, 2026248Tiger trout, avg 12.01 in
2026 · 4,993 fish on 15 dates
DateSpeciesFishAvg. length
Sep 22Tiger trout24812.01 in
Aug 31Rainbow trout20111.24 in
Aug 24Rainbow trout20111.24 in
Aug 12Rainbow trout25010.77 in
Aug 3Rainbow trout30010.5 in
Jul 27Rainbow trout30010.77 in
Jul 20Rainbow trout30010.77 in
Jul 16Rainbow trout30010.77 in
Jul 14Tiger trout29711.67 in
Jul 8Rainbow trout14910.98 in
Jul 8Rainbow trout14910.98 in
Jun 29Rainbow trout30010.5 in
Jun 24Rainbow trout6029.82 in
Jun 24Brook trout4962.99 in
Jun 10Rainbow trout30210.14 in
Jun 8Rainbow trout30010.14 in
Jun 3Tiger trout2989.89 in
2025 · 5,876 fish on 15 dates
DateSpeciesFishAvg. length
Sep 4Rainbow trout30110.96 in
Sep 2Rainbow trout30012.77 in
Aug 14Tiger trout25011.26 in
Aug 11Rainbow trout31212.44 in
Aug 4Rainbow trout15012.95 in
Aug 4Rainbow trout15012.95 in
Jul 29Rainbow trout35112.44 in
Jul 21Rainbow trout35010.77 in
Jul 14Rainbow trout35210.44 in
Jul 11Brook trout1,3593.6 in
Jul 10Tiger trout30011.08 in
Jul 9Rainbow trout35010.77 in
Jul 7Rainbow trout35010.77 in
Jun 25Tiger trout29811.08 in
Jun 24Rainbow trout34810.14 in
Jun 17Rainbow trout27710.6 in
Jun 17Rainbow trout7810.6 in
Every year since 2019
YearStocking datesFish
2026154,993
2025155,876
2024144,795
2023145,027
2022165,111
2021155,507
2020146,727
2019136,168
2019 – 2026

Trout stocked each year

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

  1. 6.2k2019: 6,168 fish
  2. 6.7k2020: 6,727 fish
  3. 5.5k2021: 5,507 fish
  4. 5.1k2022: 5,111 fish
  5. 5.0k2023: 5,027 fish
  6. 4.8k2024: 4,795 fish
  7. 5.9k2025: 5,876 fish
  8. 5.0k2026: 4,993 fish

What is stocked here

All records since 2019
SpeciesFishShare
Rainbow trout26,79161%
Tiger trout13,31930%
Brook trout4,0949%

Where it is

Utah trout stockingAll Duchesne County watersRecently stocked in Utah

Open on a map

Map point 40.7222, -110.8667: the USGS Geographic Names Information System point for this lake (feature 1426237). 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, Mirror Lake, Pass Lake, Moosehorn Lake.

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