Mammoth Creek

Name: Trout stocking records: Mammoth Creek, Utah
Creator: Stocking Record

Utah DWR logged 4 trout stocking dates at Mammoth Creek in 2026 so far, 4,048 fish in all. The latest was on Jun 23, 2026. Utah DWR lists it as “Mammoth Cr”.

Utah DWR data pulled Nov 6, 2026. Latest record in the Utah DWR data for any water: Nov 4, 2026.

A river — Photo: luxstorm, Pixabay License, Pixabay

Mammoth Creek in numbers

fish stocked in 2026, through Nov 6: 4,048
by the same date in 2025: 4,794
in all of 2025: 4,794

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, Jun 23, 2026242Rainbow trout, avg 10.54 in

2026 · 4,048 fish on 4 dates
Date	Species	Fish	Avg. length
Jun 23	Rainbow trout242 fish	242	10.54 in
May 20	Tiger trout500 fish	500	10.19 in
May 18	Rainbow trout260 fish	260	10.12 in
May 6	Brown trout3,046 fish	3,046	3.28 in

2025 · 4,794 fish on 3 dates
Date	Species	Fish	Avg. length
Jul 8	Rainbow trout251 fish	251	10.51 in
Jun 4	Tiger trout511 fish	511	9.21 in
May 28	Brown trout3,780 fish	3,780	4.11 in
May 28	Rainbow trout252 fish	252	10.21 in

Every year since 2020
Year	Stocking dates	Fish
2026	4	4,048
2025	3	4,794
2024	3	4,204
2023	3	4,321
2022	4	4,160
2021	2	5,522
2020	3	5,794

2020 – 2026

Trout stocked each year

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

5.8k2020: 5,794 fish
5.5k2021: 5,522 fish
4.2k2022: 4,160 fish
4.3k2023: 4,321 fish
4.2k2024: 4,204 fish
4.8k2025: 4,794 fish
4.0k2026: 4,048 fish

What is stocked here

All records since 2020
Species	Fish	Share
Brown trout	23,007	70%
Rainbow trout	7,207	22%
Tiger trout	2,629	8%

Where it is

Utah trout stocking All Garfield County waters Recently stocked in Utah

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

Also in Garfield County: Panguitch Lake, Posey Lake, Pine Lake, East Fork Sevier River, Deer Creek Lake Ebs, North Creek, Sevier River, Wide Hollow Reservoir.

Source: DWR fish stocking report, Utah Division of Wildlife Resources. Pulled Nov 6, 2026. Check the agency and the current fishing rules before you go.