Mammoth Creek Fishing Regulations
Garfield County, Utah · 2026 size limits, bag limits, and seasons
Mammoth Creek is a creek in Garfield County, Utah. It has its own fishing regulations for 7 species, including Brook Trout, Brown Trout, Cutthroat Trout, and Golden Trout. These rules replace Utah's statewide limits on this water.
Map of Mammoth Creek
Fish with special rules on Mammoth Creek
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Mammoth Creek limits by species (2026)
| Species | Size limit | Daily bag | Season |
|---|---|---|---|
| All Fish SpeciesArtificial Only | – | – | Year-round |
 Brook Trout | 10–15" slot | 2 | Year-round |
 Brown Trout | 10–15" slot | 2 | Year-round |
 Cutthroat Trout | 10–15" slot | 2 | Year-round |
 Golden Trout | 10–15" slot | 2 | Year-round |
 Lake Trout | 10–15" slot | 2 | Year-round |
 Rainbow Trout | 10–15" slot | 2 | Year-round |
 Steelhead | 10–15" slot | 2 | Year-round |
– means no limit is listed for this water. Rules not shown here follow Utah's statewide regulations.
Plan your Mammoth Creek trip
Mammoth Creek fishing: common questions
What fish have special regulations on Mammoth Creek?
7 species have rules specific to Mammoth Creek: Brook Trout, Brown Trout, Cutthroat Trout, Golden Trout, Lake Trout, Rainbow Trout, and Steelhead.
What is the brook trout limit on Mammoth Creek?
Brook Trout have a 10–15" slot limit on Mammoth Creek, and the daily bag limit is 2.
What is the brown trout limit on Mammoth Creek?
Brown Trout have a 10–15" slot limit on Mammoth Creek, and the daily bag limit is 2.
What is the cutthroat trout limit on Mammoth Creek?
Cutthroat Trout have a 10–15" slot limit on Mammoth Creek, and the daily bag limit is 2.
Do Utah statewide fishing rules apply on Mammoth Creek?
Where Mammoth Creek has its own rule for a species, that rule replaces the statewide limit. For species not listed on this page, Utah's statewide regulations apply. Regulations are set by the Utah Division of Wildlife Resources; confirm with the official 2026 regulations before keeping a fish.
Other Utah waters with special regulations
- Logan River · Cache
- Green River · Carbon, Daggett, Emery, Grand, San Juan, Uintah and Wayne
- Flaming Gorge Reservoir · Daggett
- Provo River · Summit, Utah and Wasatch
- Calder Reservoir · Uintah
- Kolob Reservoir · Washington
- Lake Powell · Garfield, Kane and San Juan
- Weber River · Summit
- Fish Lake · Sevier
- Minersville Reservoir · Beaver
- Panguitch Lake · Garfield
- Hobbs Reservoir · Davis
Take Mammoth Creek rules on the water
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