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Wasatch County

Mill Hollow Reservoir

Utah DWR logged 11 trout stocking dates at Mill Hollow Reservoir in 2026 so far, 12,124 fish in all. The latest was on Sep 14, 2026. Utah DWR lists it as “Mill Hollow Res”.

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

Mill Hollow Reservoir in numbers

fish stocked in 2026, through Nov 5
12,124
by the same date in 2025
11,936
in all of 2025
11,936
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 14, 2026504Rainbow trout, avg 10.99 in
2026 · 12,124 fish on 11 dates
DateSpeciesFishAvg. length
Sep 14Rainbow trout50410.99 in
Sep 2Rainbow trout50611.07 in
Aug 17Rainbow trout50112.4 in
Aug 4Rainbow trout50012.53 in
Jul 27Tiger trout6883.36 in
Jul 21Rainbow trout5009.98 in
Jul 6Tiger trout3,3353.35 in
Jul 6Brook trout1,5032.97 in
Jul 6Tiger trout5153.27 in
Jul 6Rainbow trout50110.54 in
Jun 23Rainbow trout80111.22 in
Jun 17Rainbow trout59911.49 in
Jun 3Rainbow trout80012.03 in
May 13Rainbow trout50610.33 in
May 13Rainbow trout36511.02 in
2025 · 11,936 fish on 12 dates
DateSpeciesFishAvg. length
Oct 8Tiger trout3,5005.27 in
Sep 16Rainbow trout61511 in
Sep 2Rainbow trout49910.81 in
Aug 18Rainbow trout50010.75 in
Aug 4Rainbow trout60011.95 in
Aug 4Rainbow trout50110.5 in
Jul 22Rainbow trout66411.95 in
Jul 22Rainbow trout50010.75 in
Jul 10Rainbow trout37510.3 in
Jun 25Rainbow trout62510.3 in
Jun 18Brook trout1,5003.06 in
Jun 18Tiger trout5553.31 in
Jun 12Rainbow trout5019.69 in
May 29Rainbow trout5029.62 in
May 15Rainbow trout4999.73 in
Every year since 2019
YearStocking datesFish
20261112,124
20251211,936
2024913,459
2023810,782
2022912,403
2021713,345
2020917,419
2019814,756
2019 – 2026

Trout stocked each year

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

  1. 15k2019: 14,756 fish
  2. 17k2020: 17,419 fish
  3. 13k2021: 13,345 fish
  4. 12k2022: 12,403 fish
  5. 11k2023: 10,782 fish
  6. 13k2024: 13,459 fish
  7. 12k2025: 11,936 fish
  8. 12k2026: 12,124 fish

What is stocked here

All records since 2019
SpeciesFishShare
Rainbow trout52,68150%
Tiger trout38,44136%
Brook trout15,10214%

Where it is

Utah trout stockingAll Wasatch County watersRecently stocked in Utah

Open on a map

Map point 40.4901, -111.1060: the USGS Geographic Names Information System point for this reservoir (feature 1443466). 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 Wasatch County: Strawberry Reservoir, Deer Creek Reservoir, Jordanelle Reservoir.

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