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  • Writer's pictureEvie Cameron

2023 August Fly-Fishing on Owyhee River

Updated: Sep 5, 2023

Understanding the Owyhee River:

The Owyhee River is renowned for its brown trout and rainbow trout populations, which thrive in its clear, cold waters. The river flows through rugged canyons, creating an enchanting setting for anglers to immerse themselves in nature while pursuing their angling goals. August can be a fantastic time to visit, but it's essential to understand the unique characteristics of the river during this month.

Hatches and Fly Patterns:

August sees a mix of hatches that can keep both dry fly and nymph enthusiasts busy. Look out for:

  1. Tricos: These tiny mayflies can hatch in the morning, offering excellent dry fly opportunities. Patterns like the Griffith's Gnat and Parachute Adams in smaller sizes can imitate these delicate insects effectively.

  2. Caddisflies: As the day progresses, caddisflies become active. Elk Hair Caddis, X Caddis, and other caddis imitations can be productive when fished with skittering or dead-drift presentations.

  3. Terrestrials: During the warm afternoons, terrestrials like hoppers and ants can attract the attention of hungry trout. Experiment with various sizes and colors to find out what the fish prefer.

Tactics and Techniques:

  1. Early Mornings for Tricos: Start your day early to take advantage of the trico hatch. Fish light tippet and small, delicate patterns to match the size of the insects.

  2. Nymphing: As the sun gets higher, transition to nymphing. Use beadhead nymphs and emergers like Pheasant Tails, Hare's Ears, and Zebra Midges. Focus on seams, riffles, and pockets where trout might be feeding.

  3. Caddis Activity: When caddis activity picks up, switch to dry flies and swinging wet flies near the surface. The downstream swing can imitate caddis in their natural movement.

Water Conditions and Gear:

August on the Owyhee River often means lower water levels, clear water, and wary trout. This calls for a stealthy approach:

  1. Light Tippet: Consider using 5X or 6X tippet to present your flies more naturally, especially during the trico hatch.

  2. Long Leaders: Extend your leader to minimize line splash and reduce the chances of spooking fish.

  3. Subtle Presentation: Make delicate presentations to avoid alarming trout in the clear water. This is especially crucial during the midday when the sun is high.

  4. Wading Approach: The Owyhee's canyon terrain can be treacherous. Opt for lightweight wading gear, and exercise caution when moving in and out of the water.


Remember that the Owyhee River is a delicate ecosystem. Practice catch-and-release fishing to help preserve the trout population, and follow Leave No Trace principles to minimize your impact on the environment.

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