Colorado ·
Arkansas River Fly Fishing Report - October 4, 2026
ARKANSAS RIVER
ReportOCT 4 — 11, 2026
🌊
Flow
—CFS
🌡️
Water Temp
—
☀️
Weather
41–77°F
Partly Cloudy
💧
Clarity
Clear
Check post-storm
Live USGS gauge data is unavailable for today, but recent web intel from October 2 shows flows near 315 CFS at Hecla Junction and 357 CFS at Wellsville with water temps in the 48–54°F range and clearing to clear conditions above Nathrop — expect similar or slightly improved clarity heading into this sunny weekend.
What's Working — Hot Flies
Parachute - Blue Wing Olive #22
#22
Juju Baetis Tungsten #22
#22
Top Secret Baetis #16
#16
Olsen's Hare's Ear Blowtorch Barbless #20 - 28
#20
Black Zebra Midge(TBH) #20
#20
Egan's Frenchie #12
#12
Corn-fed Caddis (CDC) Tan #20
#20
Bionic Ant 2.0 - Black #16
#16
Coffey's CH Sparkle Minnow Sculpin #6
#6
Egan's Silver Bullet - Baetis #14
#14
Olsen's Quilldigon - Olive - Barbless #22 - 24
#22
Egan's Thread Frenchie Jig - Olive #12
#12
Hatch Chart
| Insect | Size | Activity | Prime Time |
|---|---|---|---|
| Blue-Winged Olive (Baetis) | 20-22 | Heavy | 11 AM - 3 PM |
| Midge | 20-24 | Moderate | 9 AM - 12 PM |
| Caddis | 16-20 | Moderate | 3 PM - 6 PM |
| Terrestrials (Ants) | 16 | Light | 12 PM - 4 PM |
| Sculpin / Baitfish | 4-6 | Light | 7 AM - 10 AM |
Best Time Window
- 7 AM - 10 AM: Tight-line nymphing with heavy jigs through deep runs and pocket water before the hatch.
- 11 AM - 2 PM: Prime BWO hatch window — target rising fish in flat tailouts with small dries and emergers.
- 3 PM - 5:30 PM: Caddis and terrestrial dry-fly action along grassy banks; switch to streamers as storm clouds build after 4 PM.
Guide's Tip
From the benchWith water temps in the upper 40s to low 50s, trout are actively feeding and the BWO hatch is your best dry-fly opportunity of the day — position yourself upstream of flat tailouts and target fish that are holding just below the surface film between 11 AM and 2 PM. Start the morning with a heavy jig nymph like the Frenchie fished tight-line at 1.5x the water depth through deeper runs to pick up fish before the hatch fires. As afternoon thunderstorm chances build after 4 PM, shift to streamers in the deeper boulder pockets — brown trout in particular will move aggressively ahead of changing weather. Keep your leaders long (12–14 feet) in the clear upper and middle basin stretches; fish are spooky in this visibility.
Main Species
Brown Trout
Rainbow Trout
Mountain Whitefish
