Mammoth Creek
Fishing, stocking, and current conditions
Rainbow trout, brown trout, and tiger trout water; 4 stockings on the 2026 record, spread May to June, heaviest in May. One of 59 stocked waters on the Garfield County record. A USGS gauge reports from this water, so the conditions card on this page is live.
Garfield County · Utah · see it on the national map
The year here
stocked last 7 days announced ahead · tap a tick for details
What swims here
Rainbow trout
Brown trout
Tiger trout
Stocking record 2026
Agency feed checked today.
| Date | Species | Size | Fish | Status |
|---|---|---|---|---|
| May 6 | Brown trout | fingerling | 3,046 | completed |
| May 18 | Rainbow trout | adult | 260 | completed |
| May 20 | Tiger trout | adult | 500 | completed |
| Jun 23 | Rainbow trout | adult | 242 | completed |
When to fish Mammoth Creek
| Major periods (~2 h) | Minor periods (~1 h) | |
|---|---|---|
| Today | 10:11 am-12:11 pm and 10:34 pm-12:34 am | 4:30-5:30 am and 4:42-5:42 pm |
| Tomorrow | 10:57 am-12:57 pm | 5:36-6:36 am and 5:09-6:09 pm |
Moon: waxing gibbous, 93% lit. These are solunar periods, the traditional feeding-time theory: majors around the moon's transit overhead and underfoot, minors around moonrise and moonset. Theory, not a measurement. Times are Mountain Time (MDT).
What the record actually says
- Last stocked Jun 23
- Flow 229% of the seasonal median
Computed this evening, Oct 23 · Utah fishing forecast
Gear for this water
It has been a while since the trucks came. The holdovers have spread out and wised up; downsize and fish natural.
For the trout (rainbow trout stocked 2 times here in 2026, moving water)
| Light spinning rod | 5 to 6.5 ft light or ultralight; short rods cast under branches |
| Inline spinners | 1/16 to 1/8 oz silver or gold; swing them across the current seams |
| Drifted bait | single salmon egg or half a crawler under light split shot, rolled along the bottom |
Suggestions follow from what the state actually stocks here and what kind of water it is, nothing else. No sponsored placements.
Nearby stocked waters
The closest waters with stocking pages of their own, straight-line miles from this one.
| Water | Distance | Most recent |
|---|---|---|
| Asay Creek | 0.6 mi | Jun 12 |
| Blubber Creek | 11 mi | Jul 15 |
| Kanab Creek Upper | 11 mi | Sep 10 |
| Virgin River E Fork | 11 mi | May 21 |
| Sevier River E Fork | 11 mi | Jun 25 |
Follow Garfield County stocking: RSS / Calendar (iCal) / Print the schedule