Weekly San Juan River Fishing Report August 24, 2026

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Lady holding rainbow trout san juna river fly fishing

Quick Fishing Overview

  • Flows: 980 cfs
  • Water Temp: 40s (℉)
  • Clarity: 5ft visibility
  • Nymphing: Great
  • Dry Fly: Here & there
  • Streamer: Decent
  • Weather: Sunny. AM: 60s. PM: 80s/90s.
  • Lower River Guide Trips: We're offering them! Just let us know.

Summary: Well, the 90-degree temps continued into this week after all, but the forecast is for temps to finally fall back down into the low and mid-80s at the end of the week. We're starting to notice the water clearing up a bit, which has us hopeful for some

end-of-summer dry fly fishing. Back in November, we had a giant storm that washed lots of mud into the lake, which is still causing us to have off-color water this summer. We expect this week to primarily be one of nymph fishing. Streamers should work well in the early morning and late evening, with the trout locking in to midges and mayflies in the midday.

Flows and Weather

Current River Conditions

San Juan River Flows

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Detailed Report by River Section

The Quality Waters

Overview: Well, this section is fishing like classic August conditions: very midge-heavy. Normally, you could also fish dry flies like hoppers, beetles, ants, mayflies, and midges with decent luck, but the lack of cloud cover and off-color water means fewer hatches and a less-visible surface for the fish. Until things improve, stick to nymph rigs and use patterns like red midge larvae, midge pupae in black or olive, and mayfly patterns like RS2s in black or gray. Sizes 22 and 24 are the mainstays right now.

Tips/Technique: Keep an eye out for tailing fish. It may look like they're feeding on the surface when, in fact, they are feeding just below it. You can see their tails break the surface rather than their heads. To catch these fish, use a nymph rig with only a foot or two between the indicator and weight. When fishing this way, we usually keep the weight light, often fishing just a #7. A small indicator is also key. A tiny cork or pinch-on indicator works best.

The Lower River

Overview: Still the section to fish if you want solitude and brown trout that fight, it hasn't been as great for dry flies as it normally is in the summer. It doesn't mean you should leave your dries at home; it's just best to plan on fishing nymph rigs while also being ready to cast a dry if you spot a riser. Larger bugs are the name of the game out here. Griffith's Gnats, hoppers, ants, beetles, and Elk Hair Caddis all work on this section. Since we got sand deposited in this section recently, try red, orange, or burnt orange worm patterns for your top fly and a Pheasant Tail or Baetis fly in size 18 as your bottom fly. Fish depths of 4 to 6 feet if you can't see the bottom.

Tips/Technique: With the sand deposit that came in after the rainstorm, you can fish them with a worm and heavy weight. The goal is to get your rig to drag bottom a bit. Since the bottom of the river is sandy, the rig isn't likely to get stuck. If the indicator slows, give the line a firm downstream mend to pop the weight and flies off the bottom. They will then sink back down before you give the rig another mend. This up-and-down motion off the bottom can drive the trout crazy and entice some nice eats!

The Village

Overview: The Village has been fishing quite well. If you are willing to take the time to hike away from the parking lots, which are where this section gets stocked, you'll encounter larger fish. A lot of these have been brown trout that hang in some faster-moving water. While many are in the 15- to 20-inch range, they are strong fighters and are fun to bring in. Nymph rigs with worms and Pheasant Tails have worked best here. The fish have mostly been closer to the river bottom, so err on the side of more weight. Dry fly fishing has been so-so at best here. If you want to avoid a nymph rig, try streamers in some of the faster water.

Tips/Technique: For streamer fishing, we tend to still use floating lines on this river. Once our cast lands, we give the streamer a solid 15 to 20 seconds to sink and vary our retrieval patterns. We'll use long, slow strips for one cast, then try faster, shorter strips on the next. Play around with it and see what the fish like that day.

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.

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