Weekly San Juan River Fishing Report September 28, 2026

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2026 09 28 John Wade Fishing On Rainy Day

Quick Fishing Overview

  • Flows: 280 CFS
  • Water Temp: 40s (℉)
  • Clarity: 3-5ft visibility
  • Nymphing: Great
  • Dry Fly: Great
  • Streamer: Decent
  • Weather: Rainy then sunny after Thurs. AM: 40s/50s. PM: 70s.
  • Lower River Guide Trips: Flows likely too low. Ask your guide.

Summary: The rains have brought murkier water, but fish are still eating away. Bigger and brighter has been the way to go, with many of our guides fishing leeches, worms, eggs, and red midge larva. Midge and Baetis nymphs have still been working; just try

something that can be seen, like a Zebra Midge or even just a foam-wing emerger in chocolate or gray. That higher-vis wing case will show through. The cloudy days have also meant solid hatches coming off, and the trout are eating despite the off-color water. We're late in the season for ants, hoppers, beetles, etc. Instead, fish smaller dries like a Parachute Adams, midge clusters, and Comparaduns in sizes 18 through 22.

Flows and Weather

Current River Conditions

San Juan River Flows

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Detailed Report by River Section

The Quality Waters

Overview: Lots of rainy weather means off-color water. Last week, we suggested dark midges, but this week it's more about bigger, higher-visibility patterns. Bunny leeches, San Juan Worms, and even yarn eggs are working. You can still fish a midge as your dropper fly, just use something a little more visible. Last week, we suggested a size 22 Big Mac. That will still work; just opt for a brighter color scheme like olive or yellow over, say, black and gray. A size 18 Pheasant Tail is also a nice, visible option. Hatches have still been strong on cloudy days, so if one comes off, have sizes 18–22 of Comparaduns, Griffith's Gnats, and Parachute Adams.

Tips/Technique: The San Juan rarely flows from the dam off-color. Instead, it loses clarity due to mud that flows in from the many washes that connect with the river below the dam. When we get heavy rains like this week, fish closer to the dam where the water is still clear and the river hasn't yet intercepted any muddy washes.

The Lower River

Overview: The flows are low, and lots of washes have dumped mud into the river by the time it hits this point. The lower river isn't the move this week.

Tips/Technique: TBD.

The Village

Overview: Big attractor patterns like a San Juan Worm or a bunny leech are also working here. A size 16 or 18 Pheasant Tail as a dropper is a good choice. Really, any midge or mayfly pattern with some gold rib or flash wings is the right amount of "hey, look here" should do the trick. Should a hatch come off, fish the same dry flies as mentioned in the Quality Waters above.

Tips/Technique: Scout for places that might have a bit more water clarity than the rest of the river. A slower fork from the main current can give the sediment time to settle.

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
Yarn Egg Red, Pink, Orangel 16 to 18
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

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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