The Complete Guide to Idaho Steelhead Fishing

Idaho steelhead are among the most inland-migrating fish in the world, traveling over 800 miles from the Pacific Ocean to spawn in the pristine waters of the Clearwater, Salmon, and Snake River systems. They're often called "the fish of 10,000 casts" for a reason—but when you hook one, you'll understand why anglers return year after year.

Understanding Idaho Steelhead Runs

Idaho receives two distinct runs of steelhead each year, classified as A-run and B-run fish based on their size and timing.

A-Run Steelhead

Timing: September through November

Size: 5-10 lbs (smaller, more numerous)

A-run fish are ocean-age 1 steelhead that spend one year in the Pacific before returning. They enter the Columbia in summer and reach Idaho rivers by early fall. While smaller than B-run fish, A-run steelhead are more numerous and provide consistent action from September through November.

B-Run Steelhead

Timing: November through March

Size: 10-20+ lbs (fewer, but trophy-class)

B-run steelhead spend 2-3 years in the ocean, reaching trophy proportions. Some exceed 30 lbs. The Clearwater River is famous for its B-run fish, with the peak bite occurring in December through February. These are the fish that steelhead dreams are made of.

Top Steelhead Rivers in Idaho

Clearwater River

The Clearwater is Idaho's premier steelhead destination. The mainstem, North Fork, and South Fork all receive significant returns. Key access points include:

• Orofino area: Excellent bank access, local guides available
• Kooskia to Kamiah stretch: Less crowded, good wade fishing
• Dworshak Dam tailwater: Cold water holds fish year-round

Salmon River

The "River of No Return" offers a true wilderness steelhead experience. The main Salmon and its tributaries (Little Salmon, Rapid River) provide both quality fish and uncrowded water. Float trips are popular for accessing remote runs.

Snake River (Hells Canyon)

The Snake River below Hells Canyon Dam offers excellent steelhead fishing with stunning scenery. Jet boat access is common for reaching prime holding water. The run peaks in October-November for A-run and January-March for B-run fish.

Tactics That Work

Bobber and Jig

The most popular technique for Idaho steelhead. Fish a 1/8 to 1/4 oz marabou jig under a slip float, drifting through holding water at the same speed as the current. Colors that work: cerise, pink, orange, and black. Add a small piece of shrimp or egg for scent.

Swinging Flies

Spey fishing has exploded in popularity on Idaho rivers. Use a 7-8 weight switch or spey rod with a sink-tip line. Classic patterns include intruder-style flies, string leeches, and marabou spiders. Work the fly through the run at a 45-degree angle, allowing it to swing across the current.

Back-Bouncing Bait

Traditional and effective. Use a heavy sinker to bounce along the bottom while drifting eggs, shrimp, or sand shrimp. This technique excels in deep, slow pools where steelhead stack up during migration.

Gear Recommendations

• Spinning: 9-10' medium-heavy rod, 2500-3000 size reel, 15-20 lb braid with 12-15 lb fluorocarbon leader
• Fly: 7-8 weight spey/switch rod, large arbor reel with strong drag, 300-400 grain sink tips
• Terminal: Jigs (1/8-1/4 oz), egg clusters, sand shrimp, intruder flies
• Accessories: Quality waders, studded boots (rocks are slippery), net with knotless mesh

License & Regulations

In addition to a valid Idaho fishing license, steelhead require a Salmon/Steelhead Permit (additional fee). Most waters have a 2-3 fish annual limit, with many popular runs designated catch-and-release for wild steelhead. Always check the current IDFG Fishing Planner for specific regulations.

When to Go

• September-October: Early A-run fish, pleasant weather, lower water
• November: Overlap of A and B runs, prime time
• December-February: Peak B-run, coldest weather, fewest crowds
• March-April: Late B-run, fish are often darker but still aggressive