Weekly San Juan River Fishing Report October 12, 2026

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2026 10 12 san juan river drift boat

Quick Fishing Overview

  • Flows: 285 CFS
  • Water Temp: 40s (℉)
  • Clarity: 5ft visibility
  • Nymphing: Great
  • Dry Fly: Great
  • Streamer: Great
  • Weather: Lots of cloudy days. AM: 30s/40s. PM: 50s/60s.
  • Lower River Guide Trips: Not running these. Flows too low.

Summary: We're having some cold starts to the day this week, but the afternoons are still really nice. Continued cloud cover means more dry fly action, plus streamer fishing is heating up. The water has returned to its 2026 levels of clarity, and the fish are back on bugs.

Flows and Weather

Current River Conditions

San Juan River Flows

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Detailed Report by River Section

The Quality Waters

Overview: The big thing to note this week is that our guides are reporting solid success with streamers. Fall, winter, and spring are best for streamers. Right now, the brown trout are getting more aggressive as they enter spawning season. Woolly Buggers, Sculpzillas, and jig-head streamers have all worked well. As long as the fly is the size of a baitfish, the exact hook isn't critical like it is with our midge and mayfly patterns. We expect more hatches to come off with the cloudy days, so be ready with sizes 18–22 of Comparaduns, Griffith's Gnats, and Parachute Adams. For nymphing, we're off the flashy, high-vis patterns and fishing normal midge and mayfly patterns like Big Macs and Mono Midges in gray, dark brown, and dark green variations. Fluff Baetis, RS2s, and Chocolate Foam Wings have done well for mayfly patterns. All of these bugs should be fished in sizes 20 to 24.

Tips/Technique: For streamers, we don't really fish any sort of line that sinks. A 9-foot leader works fine; just be sure the fly gets plenty of time to sink so that it gets down right near the bottom. With each cast, alternate your stripping motions between long and slow, then short and fast.

The Lower River

Overview: The flows are too low for this section. We tend to fish it May–September, when the dam releases higher flows for irrigation during the summer growing season.

Tips/Technique: N/A

The Village

Overview: The water color here is back to normal. Not much change to mention. Still fish San Juan Worms or bunny leeches to a smaller fly like a size 16 or 18 Pheasant Tail. Like in the Quality Waters, less visible flies like a Fluff Baetis for the dropper fly are also a good choice. 18 to 20 is about the right size. We're seeing similar hatches here as in the Quality Waters, so bring the flies we list in the "Quality Waters" section of this report. It's a great place to fish dries since the fish can be less skittish and picky here.

Tips/Technique: Also keep an eye out for and avoid the weed beds. There are more fish and less hassle away from them.

Current Fly Recs

You can purchase flies and licenses at our fly shop. Many are hand-tied by our own guides.

Sub-Surface Flies

Name Colors Sizes
Bunny Leeches Olive, Gray, Natural 8 and 10
San Juan Worm Brown, Red, Burnt Orange, Natural 10 to 14
Midge Larvae Red 16 to 22
Rojo Midge Gray, Olive, Brown 20 to 22
Mono Midge Black, Olive, Slate, Brown 20 to 22
Zebra Midge Black, Slate, Brown 20 to 22
Big Mac Black, Slate 20 to 22
Foam Wing RS2 Brown, Black, Gray 18 to 22
Fluff Baetis Gray, Brown 20 to 22
Scintilla Midge Black, Gray 20 to 22

Streamers

Name Colors Sizes
Sculpzilla Olive, Gray, Black 8 and 10
Wooly Bugger Dark Brown, Olive 10 to 12
Jig Heads Streamers Black, Chartreuse 8 to 10

Dry Flies

Name Colors Sizes
Parachute Adams Standard 18 to 22
Comparadun Standard 18 to 22
Ants Black 16 to 18
Hoppers Gray, Tan, Yellow Variations 16 to 18

Planning a Trip to the San Juan?

Our lodge offers guided fishing and comfy rooms right on the river.

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