Utah ·
Green River Fly Fishing Report - May 31, 2026
GREEN RIVER
ReportMAY 31 — JUN 7, 2026
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Flow
—CFS
🌡️
Water Temp
—
☀️
Weather
40–74°F
Partly Cloudy
💧
Clarity
Clear
Check post-storm
USGS gauge data is unavailable for this report date; fish conditions based on recent guide intel showing flows stabilizing after a Bureau of Reclamation release, with fish redistributing from refuge water back into prime seams, inside bends, and back eddies. Weather is favorable — a mostly sunny Sunday with a slight afternoon shower chance (high 67°F) gives way to a clear Sunday night and a warm, sunny Monday (high 74°F), setting up excellent late-morning and midday hatch windows.
What's Working — Hot Flies
Tungsten Tailwater Sowbug - Rainbow #10
#10
Tungsten Rainbow Warrior - Extra Heavy #14
#14
Olsen's Hare's Ear Blowtorch Barbless #20
#20
Roza's World Spain Perdigon Barbless #18
#18
Tungsten Split Case Nymph - PMD #20
#20
Black Zebra Midge (TBH) #20
#20
Parachute - Blue Wing Olive #22
#22
Corn-fed Caddis (CDC) Tan #20
#20
Egan's CDC Rainbow Warrior #22
#22
Coffey's CH Sparkle Minnow Sculpin #6
#6
Hatch Chart
| Insect | Size | Activity | Prime Time |
|---|---|---|---|
| Midges (Chironomidae) | #20–24 | Heavy — consistent all day | Morning & evening; back eddies all day |
| Blue-Winged Olive (Baetis) | #18–22 | Active — best on overcast or partly cloudy periods | 11 AM – 2 PM; cloud cover triggers best rises |
| Caddis (Brachycentrus — Mother's Day) | #14–18 | Tapering but still present | Afternoon; slower water, foam lines & eddies |
| Pale Morning Dun (PMD) | #16–20 | Just starting — building | Mid-morning; A Section weed beds |
| Sowbugs / Scuds | #10–18 | Consistent sub-surface year-round | All day — reliable anchor pattern |
| Crane Fly Larvae | #6–8 | Opportunistic — post high-water | All day; seams and soft edges |
Best Time Window
- Early morning (6:00 AM – 9:00 AM): Midge and sowbug nymphing in back eddies and seams — consistent action before surface pressure builds
- Midday (11:00 AM – 2:00 PM): Prime BWO and midge dry fly window, especially Sunday with partly cloudy skies — watch foam lines and flat tailouts for sipping rises
- Afternoon (2:00 PM – 5:00 PM): Tapering caddis activity in slower water and foam lines; swing or skate a Corn-fed Caddis CDC along eddies for opportunistic surface takes
Guide's Tip
From the benchWith flows stabilizing and fish redistributing after the recent high-water event, cover water efficiently early in the day using a heavy anchor nymph like the Tungsten Tailwater Sowbug to locate active pods — once you find them, slow down and work the seam thoroughly. The prime window on Sunday is 11 AM to 2 PM: the partly cloudy morning sky and slight afternoon shower chance create textbook BWO and midge dry fly conditions, so keep a Parachute BWO or Egan's CDC Rainbow Warrior rigged and ready to switch when you see sipping rises in foam lines and flat tailouts. Target inside bends, back eddies, and soft water behind boulders — these are the refuge zones where fish stacked up during peak flows and are now actively feeding as conditions normalize. Monday's sunny 74°F forecast will warm the surface and push the best action earlier in the morning, so plan to be on the water by first light.
Main Species
Rainbow Trout
Brown Trout
Colorado River Cutthroat Trout
