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Mammoth Creek Fish Stocking

IRON County, Utah · 1980–2026 on record

Source: Utah DWR — Fish Stocking Report· updated 2026-06-23

According to Utah DWR — Fish Stocking Report, Mammoth Creek was last stocked June 23, 2026 with Rainbow Trout. Mammoth Creek has 410 stocking records on file, spanning 1980–2026, with about 456,201 fish stocked over that period.

June 23, 2026
Last stocked
456,201
Fish stocked
5
Species
410
Stocking records

When Mammoth Creek is stocked

Mammoth Creek is typically stocked in summer, most often in June — 130 stocking events in that peak month.

How Mammoth Creek's stockings spread across the calendar year.

Nearby stocked waters

Other stocked waters near Mammoth Creek, freshest activity first.

Duck Creek

9 mi

KANE County · 2 species · 220 records

Last stocked June 2026

Asay Creek

6 mi

GARFIELD County · 3 species · 236 records

Last stocked June 2026

Panguitch Lake

7 mi

GARFIELD County · 8 species · 1109 records

Last stocked May 2026

Scout Lake

7 mi

IRON County · 3 species · 51 records

Last stocked May 2026

Bunker Creek

8 mi

IRON County · 2 species · 4 records

Last stocked September 2025

Deer Creek

8 mi

IRON County · 1 species · 2 records

Last stocked September 2025

Stocking history

Most recent stockings first. Dates shown at the precision the agency reported.

DateSpeciesNumberSizeSource
June 23, 2026Rainbow Trout24210.54"Utah DWR
May 20, 2026Tiger Trout50010.19"Utah DWR
May 18, 2026Rainbow Trout26010.12"Utah DWR
May 6, 2026Brown Trout3,0463.28"Utah DWR
July 8, 2025Rainbow Trout25110.51"Utah DWR
June 4, 2025Tiger Trout5119.21"Utah DWR
June 4, 2025Tiger Trout1,0003.35"Utah DWR
May 28, 2025Brown Trout3,7804.11"Utah DWR
Show 42 more stocking records →
DateSpeciesNumberSizeSource
May 28, 2025Rainbow Trout25210.21"Utah DWR
May 21, 2025Tiger Trout1,0209.93"Utah DWR
July 18, 2024Rainbow Trout2609.83"Utah DWR
June 12, 2024Tiger Trout5018.99"Utah DWR
May 14, 2024Rainbow Trout25810.47"Utah DWR
May 14, 2024Brown Trout3,1853.46"Utah DWR
September 11, 2023Cutthroat Trout8,0661.87"Utah DWR
July 20, 2023Rainbow Trout2409.9"Utah DWR
June 27, 2023Tiger Trout60510.75"Utah DWR
April 19, 2023Brown Trout3,2122.62"Utah DWR
April 19, 2023Rainbow Trout2649.9"Utah DWR
September 12, 2022Cutthroat Trout12,3592.01"Utah DWR
July 12, 2022Rainbow Trout30610.29"Utah DWR
June 15, 2022Tiger Trout5128.74"Utah DWR
June 15, 2022Tiger Trout5128.74"Utah DWR
June 8, 2022Rainbow Trout25210.97"Utah DWR
April 19, 2022Brown Trout3,0902.95"Utah DWR
September 16, 2021Cutthroat Trout9,2502.25"Utah DWR
August 18, 2021Cutthroat Trout10,9601.73"Utah DWR
July 19, 2021Rainbow Trout1,65010.24"Utah DWR
July 13, 2021Tiger Trout1,4499.78"Utah DWR
July 1, 2021Tiger Trout1,5579.48"Utah DWR
June 15, 2021Tiger Trout30410.23"Utah DWR
May 11, 2021Rainbow Trout25210.5"Utah DWR
May 11, 2021Brown Trout3,6204.17"Utah DWR
July 7, 2020Rainbow Trout54210.06"Utah DWR
July 7, 2020Rainbow Trout78310.06"Utah DWR
May 26, 2020Rainbow Trout67110.54"Utah DWR
May 26, 2020Rainbow Trout72410.54"Utah DWR
April 20, 2020Brown Trout3,0743.25"Utah DWR
July 17, 2019Rainbow Trout74410.13"Utah DWR
July 17, 2019Rainbow Trout60010.13"Utah DWR
June 13, 2019Rainbow Trout7509.99"Utah DWR
June 13, 2019Rainbow Trout6009.99"Utah DWR
June 3, 2019Brown Trout3,9513.91"Utah DWR
July 10, 2018Rainbow Trout6078.68"Utah DWR
July 10, 2018Rainbow Trout7508.68"Utah DWR
June 19, 2018Brown Trout3,9844.3"Utah DWR
May 31, 2018Rainbow Trout59710.02"Utah DWR
May 31, 2018Rainbow Trout74910.02"Utah DWR
June 7, 2017Brown Trout3,0643.62"Utah DWR
July 20, 2016Rainbow Trout36410.44"Utah DWR

Showing 50 of 410 stocking records.

Frequently asked

When was Mammoth Creek last stocked?

According to Utah DWR — Fish Stocking Report, Mammoth Creek was last stocked June 23, 2026 with Rainbow Trout.

What fish species are stocked in Mammoth Creek?

Mammoth Creek is stocked with Rainbow Trout, Tiger Trout, Brown Trout, Cutthroat Trout, and Brook Trout.

What time of year is Mammoth Creek stocked?

Mammoth Creek is typically stocked in summer, most often in June.

How often is Mammoth Creek stocked?

Mammoth Creek has been stocked about 9 times a year — 410 recorded stockings between 1980 and 2026.

How many fish have been stocked in Mammoth Creek?

About 456,201 fish have been stocked in Mammoth Creek across 410 recorded events since 1980, per Utah fish & wildlife agency.

What size are the fish stocked in Mammoth Creek?

Fish stocked in Mammoth Creek average about 8.1 inches, based on the sizes the agency reported.

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How this is calculated: compiled automatically from Utah DWR — Fish Stocking Report open data — normalized, date-validated, and shown only at the precision the agency reported. Sources & methodology →

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