Weekly San Juan River Fishing Report August 10, 2026

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Guide and customer with large san juan trout

Quick Fishing Overview

  • Flows: 860 cfs
  • Water Temp: 40s (℉)
  • Clarity: 5ft visibility
  • Nymphing: Great
  • Dry Fly: Fair
  • Streamer: Decent
  • Weather: Sunny. AM: 60s. PM: 80s/90s w/ mostly sun.
  • Lower River Guide Trips: We're offering them! Just let us know.

Summary: The conditions and tactics from the last few weeks have not changed for this week. We have plenty of water and flows. The fish are focused mainly on the sub-surface action. We've had an uptick in reports from guides having success on streamers, while

dry fly fishing remains fair. The occasional trout can be found rising for beetles, hoppers, and ants. Occasional BWO hatches will get trout to rise in the riffles in the afternoon, especially when the afternoon is cloudy. We are still seeing fish eating shallow in the water column. Keep an eye out for this and be prepared to fish lightweight setups that extend just a foot or two below the water. These fish are mainly keyed in on tiny midges, but will also take the occasional tiny Baetis pattern.

Flows and Weather

Current River Conditions

San Juan River Flows

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Detailed Report by River Section

The Quality Waters

Overview: Fishing remains primarily subsurface with nymph rigs. Fish the usual summer tiny midge and mayfly patterns, like red midge larvae, pupae in black or olive, or RS2s in black or gray. Sizes 22 and 24 are the mainstays right now.

Tips/Technique: We have seen lots of fish feeding just below the surface. Several of our guides have had success fishing nymph rigs with only a foot or two between their indicator and their weights. When fishing this way, we usually keep the weight light, often fishing just a #7. A good bit, but not all, of the fish are feeding this way, so be sure to take a moment to assess the spot you are fishing.

The Lower River

Overview: The lower river got a bit sandy due to recent rains, but it's still the best bet for peaceful solitude and has been fishing quite well on nymph rigs. Like the Quality Waters section, dry fly fishing has slowed down here. You'll still find the opportunistic dry fly eater, though, so be sure to have a few hoppers, ants, and beetles handy. We haven't seen much caddis activity, so for flies, we recommend terrestrials like hoppers and ants, as well as midge clusters and larger BWO patterns. A Parachute Adams in size 14 is a solid, safe bet.

Tips/Technique: Fishing 4 feet of leader between the indicator and the weight is a solid starting point for our current flows. If you're fishing a deep hole, increase that 4-foot distance in 8-inch increments to cover the layers of the water column.

The Village

Overview: Fishing here has been decent. Worms, leeches, and Woolly Buggers in sizes 12 to 14 work well as your top fly. For a bottom fly, try a midge pattern or Pheasant Tail in size 16 or 18. This section is a very forgiving, less technical place for first-timers or newer fly fishers to get their bearings before venturing into the ultra-technical Quality Waters. There are still very productive honey holes holding eager but smaller-than-the-Quality-Waters trout..

Tips/Technique: 4X, whether for dry flies or nymph rigs, should be fine in this section. Most dry fly activity here will be in the afternoons and early evenings.

Current Fly Recs

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

Sub-Surface Flies

Name Colors Sizes
Vernille San Juan Worm Brown, Black, Natural 10 to 14
Midge Larvae Red 16 to 20
Rojo Midge Gray, Olive, Brown 20 to 22
Mono Midge Black, Olive, Brown 20 to 22
Foam Wing RS2 Brown, Black, Gray 18 to 20
Bunny Leeches Black, Olive, Gray, Natural, White 6 and 8

Dry Flies

Name Colors Sizes
Parachute Adams Standard 20 to 22
Comparadun Standard 20 to 22
Rosenbauer Parachute Beetle Black 10 to 24
Cartoon Hopper Gray, Olive, Brown Flash! 4 to 8
Ants Black 12 to 16

Planning a Trip to the San Juan?

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

Explore →