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San Juan County

Blanding Reservoir No 4

Utah DWR logged 5 trout stocking dates at Blanding Reservoir No 4 in 2026 so far, 11,467 fish in all. The latest was on Aug 31, 2026. Utah DWR lists it as “Blanding Res No 4”.

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

A lake with mountains
Photo: GPoulsen, Pixabay License, Pixabay

Blanding Reservoir No 4 in numbers

fish stocked in 2026, through Nov 6
11,467
by the same date in 2025
12,834
in all of 2025
12,834
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, Aug 31, 20262,005Rainbow trout, avg 10.91 in
2026 · 11,467 fish on 5 dates
DateSpeciesFishAvg. length
Aug 31Rainbow trout2,005 fish2,00510.91 in
Jul 27Tiger trout4,506 fish4,5063.03 in
May 27Rainbow trout1,456 fish1,45610.12 in
May 18Rainbow trout1,820 fish1,82010.12 in
Apr 7Rainbow trout1,680 fish1,68010.94 in
2025 · 12,834 fish on 6 dates
DateSpeciesFishAvg. length
Oct 15Rainbow trout1,540 fish1,54010.16 in
Aug 27Rainbow trout2,009 fish2,0099.32 in
Jul 17Tiger trout4,524 fish4,5243.03 in
May 19Rainbow trout1,260 fish1,26010.21 in
Apr 14Rainbow trout1,742 fish1,7429.81 in
Mar 24Rainbow trout1,759 fish1,75910.31 in
Every year since 2020
YearStocking datesFish
2026511,467
2025612,834
2024510,213
2023410,025
2022310,033
2021410,530
2020410,050
2020 – 2026

Trout stocked each year

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

  1. 10k2020: 10,050 fish
  2. 11k2021: 10,530 fish
  3. 10k2022: 10,033 fish
  4. 10k2023: 10,025 fish
  5. 10k2024: 10,213 fish
  6. 13k2025: 12,834 fish
  7. 11k2026: 11,467 fish

What is stocked here

All records since 2020
SpeciesFishShare
Rainbow trout43,58658%
Tiger trout31,56642%

Where it is

Utah trout stockingAll San Juan 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 San Juan County: Blanding Reservoir No 3, Dark Canyon Lake, Monticello Lake, Lloyds Lake, Foy Lake, Kens Lake, La Sal Creek, Medicine Lake.

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