Mammoth Creek Fishing and Stocking
Garfield County, Utah. The Utah Division of Wildlife Resources lists 4 stockings here in the latest year of its data (Brown Trout, Rainbow Trout and Tiger Trout), the most recent on Jun 23, 2026. Stocked in May, June and July in two or more years.
2026 Stocking
| Date | Species | Fish | Size |
|---|---|---|---|
| Jun 23, 2026 | Rainbow Trout | 242 | 10.54 in |
| May 20, 2026 | Tiger Trout | 500 | 10.19 in |
| May 18, 2026 | Rainbow Trout | 260 | 10.12 in |
| May 6, 2026 | Brown Trout | 3,046 | 3.28 in |
2025 Stocking
| Date | Species | Fish | Size |
|---|---|---|---|
| Jul 8, 2025 | Rainbow Trout | 251 | 10.51 in |
| Jun 4, 2025 | Tiger Trout | 511 | 9.21 in |
| May 28, 2025 | Brown Trout | 3,780 | 4.11 in |
| May 28, 2025 | Rainbow Trout | 252 | 10.21 in |
2024 Stocking
| Date | Species | Fish | Size |
|---|---|---|---|
| Jul 18, 2024 | Rainbow Trout | 260 | 9.83 in |
| Jun 12, 2024 | Tiger Trout | 501 | 8.99 in |
| May 14, 2024 | Brown Trout | 3,185 | 3.46 in |
| May 14, 2024 | Rainbow Trout | 258 | 10.47 in |
Other Stocked Waters in Garfield County
About This Data
Every row comes from the stocking information published by the Utah Division of Wildlife Resources, checked Nov 3, 2026. The agency lists this water as “MAMMOTH CR”. Species and sizes are given as the agency names them; a dash means the agency does not say.
More for Utah Anglers
Stocking dates and places can change without notice; check with the agency before a trip. ReelTourney is not affiliated with the Utah Division of Wildlife Resources.