Colorado ·
Arkansas River Fly Fishing Report - June 21, 2026

ARKANSAS RIVER
ReportJUN 21 — 28, 2026
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Flow
—CFS
🌡️
Water Temp
—
☀️
Weather
50–89°F
Clear
💧
Clarity
Clear
Check post-storm
Live USGS gauge data is unavailable for today, but recent web intel puts flows in the 280–452 CFS range depending on section, with clear to slightly stained water and water temps in the 47–62°F range — ideal summer trout conditions. Hatches are plentiful and fish are active, especially during morning and evening windows.
What's Working — Hot Flies

Corn-fed Caddis (CDC) Tan #20
20

Corn-fed Caddis (CDC) Olive #20
20

Tungsten Split Case Nymph - PMD #20
20

Stealth Link Mercer - PMD #20
20

Parachute - Blue Wing Olive #22
22

Juju Baetis Tungsten #22
22

Olsen's Straggle Stone Brown Barbless #12 - 32
12

Tungsten Pat's Rubber Legs - Tan & Brown #6
6

Bionic Ant 2.0 - Black #16
16

Bionic Ant 2.0 - Brown #12
12

Egan's Thread Frenchie Jig - Olive #12
12

Egan's Frenchie #12
12
Hatch Chart
| Insect | Size | Activity | Prime Time |
|---|---|---|---|
| Caddis | 16-18 | Heavy | 5 PM - 8 PM |
| PMD (Pale Morning Dun) | 16-20 | Moderate | 10 AM - 1 PM |
| Blue-Winged Olive (Baetis) | 20-22 | Moderate | 11 AM - 2 PM |
| Stonefly | 6-12 | Light | 7 AM - 10 AM |
| Midge | 20-22 | Light | 7 AM - 9 AM |
| Terrestrials (Ants) | 14-16 | Moderate | 12 PM - 4 PM |
Best Time Window
- 6 AM - 10 AM: Prime nymphing window before wind builds; target riffle-to-pool transitions with stonefly and Frenchie patterns on the bottom.
- 10 AM - 1 PM: PMD and BWO hatch window; switch to emergers and dry flies in slower tailouts and flat water before afternoon gusts arrive.
- 6 PM - 8 PM: Evening caddis hatch brings fish to the surface; fish CDC caddis patterns along seams and in the foam lines as light fades.
Guide's Tip
From the benchWith sunny skies and afternoon gusts up to 35 mph forecast, get your dry fly and nymph fishing done before noon — wind will make presentations sloppy by mid-afternoon. Focus nymph rigs in the 18–24 inch depth range through the heads of pools and riffle-to-run transitions where fish are stacking to intercept drifting PMD and caddis nymphs. As the wind picks up midday, switch to a single heavy terrestrial like the Bionic Ant and pound the grassy banks — trout will be looking up for blown-in food. Come evening when the wind dies, position yourself downstream of any visible rise forms and present caddis dries with a reach cast to maximize drag-free drift time.
Main Species
Brown Trout
Rainbow Trout
Mountain Whitefish