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Guided Fly Fishing trip on the San Juan River

Fly Fishing the San Juan River
Below Navajo Dam

World-renowned fishing, tailored to you.

The San Juan River below Navajo Dam in New Mexico is one of the most iconic tailwater fisheries in the world. Known for its consistent flows, abundant insect hatches, and trophy-sized trout, this stretch of river offers year-round fly fishing opportunities for anglers of all skill levels. At Durango Fly Fishing, we’re excited to guide you through the experience, whether you're a seasoned angler or a beginner looking to land your first fish.

Why The San Juan River is Unique

The San Juan River's cool, nutrient-rich waters create the perfect environment for trout to thrive. Brown and rainbow trout dominate this section, with many fish averaging 16-20 inches and some exceeding 25 inches.

With a consistent flow rate controlled by Navajo Dam, the river provides stable fishing conditions throughout the year. Anglers can expect gin-clear waters during low-flow seasons and slightly off-colored water during higher flows, which can improve fishing conditions by making fish less wary.

San Juan Hatch Chart &

Fly Recommendations

​Key Aquatic Insects:

The San Juan River is home to an abundance of aquatic insects, making it a fly angler’s dream:

  • Midges (year-round)

  • Baetis (Blue-Winged Olives) (spring-fall)

  • Leeches

  • Scuds

  • Annelids

  • Caddisflies (Downriver)

Fly Recommendations

Midges (Sizes 18-26):

  • Zebra Midge (red, black)

  • Miracle Larvae (red, olive, brown)

  • Disco Midge

  • "The Red Midge"

Baetis (Sizes 20-28):

  • CDC RS2 (gray, olive)

  • Foam Wing Emerger

  • Thread Body Baetis

  • Mercury Pheasant Tail

Other Effective Patterns:

  • San Juan Worm (especially during higher flows)

  • Egg patterns (great for fall and early spring)

  • Mop Flies (chartreuse and cream colored)

  • Streamers like Woolly Buggers, rainbow and brown trout patterns,  articulated flies and jigs for targeting larger fish

San Juan River Navajo Dam
Trout Fishing Navajo Dam on the San JUan River
Brown trout caught in texas hole san juan river

Rigs and Techniques

Nymphing

The most effective technique on the San Juan River is nymphing. Use a two-fly rig with the lead fly being an attractor pattern, such as a San Juan Worm, and the dropper being a small midge or Baetis pattern. Adjust the depth of your rig with split shot and a strike indicator to ensure the flies drift near the bottom where fish are feeding. 

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Dry Fly Fishing

While not always productive, dry fly fishing can be incredible during midge and Baetis hatches, not to mention the fabled "Ant Fall". Use small Parachute Adams, Griffith’s Gnats, or Sparkle Duns to match the hatch. Ants, being the most prolific bug in the world, are never a bad idea.

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Streamer Fishing

Streamers can be particularly effective during overcast days or higher flows. Use a sink-tip line or add weight to your leader to get the fly down. Stripping patterns like Woolly Buggers, rainbow and brown trout patterns, or articulated streamers can trigger aggressive strikes from larger fish. 

Seasonal Considerations

Drift Boat Fishing on the San Juan

Winter (November - February):

  • Conditions: Low water, clear visibility, cold weather.

  • Bugs: Midges dominate.

  • Tips: Focus on deeper runs and slower water. Layer up with insulated clothing, gloves, and waterproof gear.

Spring (March - May):

  • Conditions: Rising water levels as runoff begins.

  • Bugs: Midges and Baetis hatches.

  • Tips: Transition to longer leaders and smaller flies as fish begin to feed actively.

Summer (June - August):

  • Conditions: Stable flows, warm temperatures.

  • Bugs: Caddisflies, midges, and terrestrials like ants and hoppers.

  • Tips: Fish early mornings and evenings to avoid mid-day heat. Wear lightweight, breathable clothing.

Fall (September - October):

  • Conditions: Lower flows and cooling water temperatures.

  • Bugs: Baetis and midges.

  • Tips: This is prime time for sight fishing. Use smaller tippets (6x-7x) and delicate presentations.

Rods and Reels

A softer, slower-action rod is preferred during normal water conditions to present delicate flies and protect light tippets. During high water, a faster-action rod is ideal for handling heavier and longer rigs. Bring a reel with a smooth drag system and weight-matched floating line.

Logo for Durango Fly Fishing

Guided Trips with Durango Fly Fishing

When you book a guided trip with Durango Fly Fishing, we provide everything you need for a successful day on the water, including fly rods, reels, and terminal tackle. All you need to bring are your waders and boots if you're wading, and a valid New Mexico fishing license.We’ll take care of lunch, snacks, and beverages, ensuring you have the energy to focus on fishing. Whether you choose a full-day float or wade trip, our experienced guides will tailor the experience to your skill level and goals.

Ready to experience the magic of the San Juan River? Contact Durango Fly Fishing today to book your trip and create memories that will last a lifetime.

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