Idaho Rocky Mountain Bighorn Sheep

Unit 19 (Middle Fork Salmon River)

Idaho Hunting Guide — Rocky Mountain Bighorn Sheep

Unit 19 covers the Middle Fork of the Salmon River corridor — a federally designated Wild and Scenic River cutting through the heart of the Frank Church Wilderness. Rocky Mountain bighorn sheep have occupied these canyon walls for centuries, and the unit produces some of Idaho's most iconic wilderness sheep hunts. Access is primarily by small aircraft to backcountry airstrips, float on the Middle Fork, or horse packing — all adding to the expedition character of this tag.

View Draw Odds Idaho Hunting Guide

Rocky Mountain Bighorn Sheep Hunting in Unit 19

Where to Find Rocky Mountain Bighorn Sheep in Unit 19

The Middle Fork Salmon canyon is one of Idaho's premier bighorn habitats, with sheep distributed along the entire river corridor from the put-in near Boundary Creek to the takeout at Cache Bar.

Canyon Wall Rocky Outcrops

Glass the canyon walls from water level up to 6,000 feet. Sheep are most visible on the open rocky faces and scree slopes that characterize the Middle Fork canyon. South and west-facing exposures hold sheep on warm fall days; they move to shaded aspects during heat.

Tributary Side Canyons

Side canyons like Pistol Creek, Camas Creek, and Loon Creek drain into the Middle Fork and provide transition habitat between river-level sheep range and high-country summer range. Glass side canyon rims for sheep descending to the river in early fall.

Airstrip Drainages

Backcountry airstrips like Pistol Creek, Indian Creek, and Thomas Creek serve as access hubs. The drainages surrounding these strips often hold sheep and allow hunters to establish a base camp efficiently by air.

How to Hunt Rocky Mountain Bighorn Sheep in Unit 19

A Middle Fork bighorn hunt is a true wilderness expedition. Most successful hunters access the unit by small aircraft and spend 7–14 days in the backcountry targeting a specific mature ram.

Fly-In Base Camp Strategy

Charter a backcountry aircraft out of Challis, Salmon, or McCall to reach a Middle Fork airstrip. Establish a base camp near sheep habitat and glass systematically each day. Air access allows hunters to pack in quality optics and enough food for a thorough hunt without the 3–4 day horse pack-in.

Float and Hunt Approach

Floating the Middle Fork on a rafting permit during sheep season combines the hunt with a world-class wilderness river experience. Glass canyon walls continuously from the raft and be prepared to camp quickly and launch a foot pursuit when a legal ram is spotted on river-accessible terrain.

Ram Evaluation

Idaho requires sheep to be legal by horn size or age — study the state regulations carefully. Use a spotting scope at extended range to evaluate broomed tips, age rings, and curl. The wilderness setting means packing out a ram solo is arduous — plan your horse or pack raft logistics before the shot.

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Rocky Mountain Bighorn Sheep Success Rates

Unit 19 tag holders who commit to a full wilderness expedition achieve success rates of 65–80%. The remote access filters out casual hunters. Ram quality is generally excellent — the Middle Fork produces mature 3/4-curl and full-curl rams with good mass.

Rocky Mountain Bighorn Sheep Draw Odds

Season	Tags	Applicants	Draw %	Pts Req
Rifle— Controlled	4	96	4.2%	0

Data from 2025 draw results. Resident odds shown.

Open in Draw Odds Engine

Unit 19 is one of Idaho's most coveted sheep units — draw odds are typically under 1% for residents and non-residents alike. Average wait time exceeds 20 years for most applicants. Non-residents hunting wilderness units are required to use a licensed Idaho outfitter.

Frequently Asked Questions

Do I need a guide to hunt bighorn in Unit 19?

Non-residents hunting wilderness portions of Unit 19 (which includes most of the Frank Church Wilderness) are required by Idaho law to use a licensed Idaho outfitter. Residents may hunt unguided.

What is the best way to access Unit 19 for sheep?

Backcountry aircraft to one of the Middle Fork airstrips (Pistol Creek, Indian Creek, Thomas Creek, Boundary Creek) is the most efficient access. Float trips down the Middle Fork are also popular. Horse packing in from the Salmon or Challis side takes 3–5 days.

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Sources & Verification

Every fact on this page is tied to a primary source below. Last fact-checked 2026-04-18.

IDFG Big Game Rules — Idaho Department of Fish and Game · supports: Unit boundaries, Season structure, Tag quotas · accessed 2026-04-18
IDFG Big Game Hunting — Idaho Department of Fish and Game · supports: Species info, Draw system, License requirements · accessed 2026-04-18