San Juan River Fly Fishing Report - June 15, 2026

Fly Fishing Report

SAN JUAN RIVER

Report
JUN 15 — 22, 2026
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Flow
527CFS
SAN JUAN RIVER NEAR ARCHULETA, NM
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Water Temp
45.5°F
Updated 2026-06-15
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Weather
52–89°F
Sunny
💧
Clarity
Clear
Check post-storm
Flow is running at 527 CFS with a gauge height of 3.84 ft — stabilizing nicely into a fishable range with clear water and a cold 45.5°F water temp that's keeping trout active and feeding hard subsurface. Expect excellent nymphing throughout the day with PMD and caddis activity beginning to build as we head into the afternoon hours.
Hatch Chart
Insect Size Activity Prime Time
Midge 18-22 Heavy 7 AM - 11 AM
PMD 16-18 Moderate 11 AM - 2 PM
Caddis 14-16 Moderate 5 PM - 7 PM
Midge Emerger 18-20 Light 8 AM - 10 AM
Best Time Window
  • 6:30 AM - 10:00 AM: Prime midge nymphing window — fish are stacked in current seams and feeding aggressively before the sun gets high.
  • 10:00 AM - 1:00 PM: PMD nymph activity builds through midday; work the gravel runs and flats with the Tungsten Split Case PMD tight to the bottom.
  • 5:30 PM - 7:30 PM: Evening caddis activity picks up as temps drop — focus on the riffles and runs with the GTI Caddis and watch for any surface feeding.
Guide's Tip
From the benchWith water temps at 45.5°F, trout are metabolically active and willing to move for a well-presented nymph — set your indicator depth so your fly is ticking the bottom in 3 to 5 feet of water through the main current seams. Use a longer, lighter tippet (5X to 6X fluorocarbon) given the clear water conditions and keep your drifts long and mend-free. As the afternoon heats up toward 86°F, shift your focus to the shaded banks and deeper runs where fish will stack up to escape the surface glare. Watch for any PMD or caddis activity picking up in the evening — if you see fish starting to nose up, switch to the Mayhem Emerger fished just under the film.
Main Species
Rainbow Trout
Brown Trout
Fly Fish Food
Report generated June 15, 2026 — Next update: June 22, 2026