Unit 21A 21A (Salmon)
North-of-Salmon foothills and sage benches — Idaho's best-known general pronghorn ground with OTC deer and elk on top.
Central Idaho — Lemhi County / Salmon River foothills (Region 7 — Salmon) · Last reviewed 2026-07-12
Area
246
sq mi
Public land
65%
approx.
Elevation
3,900–9,000
feet
Motorized
moderate
access
Overview
Unit 21A sits north of the town of Salmon, tucked between the Idaho–Montana state line and the North Fork of the Salmon River, entirely within Lemhi County. It drains the east side of the Salmon River from the Carmen Creek country up to North Fork. The land splits into foothills and open sage benches in the south and west and higher Salmon-Challis timber (6,000–9,000 ft) to the north and east. It is best known for representative general-season pronghorn on the valley benches, backed by over-the-counter deer and elk in the surrounding hills. There are no wilderness areas here.
Terrain
Open sage-and-grass foothills and river benches near 4,000 ft rising into forested mountains approaching 9,000 ft along the Montana divide. Rolling antelope country in the south transitions to timbered ridges to the north and east.
Cover: Big sagebrush, rabbitbrush and native bunchgrass on the benches and foothills; Douglas-fir and lodgepole timber on the higher north/east slopes; cottonwood and willow along Carmen Creek and the Salmon River.
Landmarks: North Fork of the Salmon River · Carmen Creek · Salmon River valley · Idaho–Montana state line (Beaverhead crest) · Freeman Peak / high divide country
Access
A patchwork of BLM and private in the sage foothills with Salmon-Challis National Forest on the higher ground. Much of the prime pronghorn ground is private or BLM interspersed with ranchland — the IDFG Access Yes program opens some private access. U.S. 93 runs the valley; county and Forest roads climb Carmen Creek and side drainages.
Managers: USFS Salmon-Challis NF, BLM, IDL, Private (valley ranches)
Access points: Salmon (U.S. 93) · Carmen / Carmen Creek Road · North Fork (U.S. 93) · BLM foothill two-tracks east of the highway
Species notes
Pronghorn
common qualityThe signature species — a solid resident pronghorn herd on the valley benches offering good hunting for representative bucks. Success is modest because much runs through general/OTC and archery seasons on mixed ownership.
- →Glass the open sage benches and foothill flats at first light
- →Spot-and-stalk using terrain rolls to close the distance
- →Watch water sources and fencelines in dry early seasons
- →Secure private-land or Access Yes permission before hunting the best benches
Mule Deer
common opportunityOver-the-counter mule deer through the foothills and timber, with roughly a third of hunters connecting. Bucks move up into the timber and down onto sage transitions with weather.
- →Glass sage/timber edges at dawn and dusk
- →Hunt higher north-slope timber early, then benches as snow arrives
- →Cover ground to find pockets away from road pressure
Whitetail Deer
limited opportunityA secondary opportunity in the Salmon River and Carmen Creek bottoms, where whitetail use riparian cover and adjacent ag.
- →Still-hunt cottonwood bottoms and creek edges
- →Watch field margins at first and last light
- →Focus riparian corridors after snowfall
Rocky Mountain Elk
common opportunityGeneral-season elk in the timbered north and east of the unit; success sits in the high-20s percent — respectable for OTC Idaho elk. Elk shift between forest and foothill feed.
- →Hunt timber pockets and wallows early, then foothill feed as pressure builds
- →Work the Forest-boundary transition where cover meets open feed
- →Glass at long range across the foothill basins
Black Bear
common opportunityBlack bears through the timbered drainages provide a dependable spring and fall opportunity where legal.
- →Glass green avalanche chutes and south slopes in spring
- →Hunt berry patches and old burns in late summer
- →Check creek bottoms for feeding sign
Pro tips
- →This is a rare Idaho unit where you can chase pronghorn low and OTC deer/elk high on the same trip
- →Sort out private vs. BLM vs. Access Yes boundaries before opening morning — ownership is a checkerboard on the antelope benches
- →Use the sage rolls and coulees to break outlines when stalking pronghorn in open country
- →Hit water sources in dry early seasons for both pronghorn and deer
- →Hunt the Forest boundary line where timber cover meets foothill feed for elk
Watch out for
- !Checkerboard private/BLM ownership on the best pronghorn benches — trespass risk is real
- !Little to no shade and hot, dry early seasons; carry ample water
- !Wolves and black bears in the timbered north — secure meat and camp
- !High Forest roads snow shut later in fall
- !Cell service fades quickly off U.S. 93
Logistics
Salmon is the base — full services, fuel, lodging, groceries and the IDFG Region 7 office — just minutes from the unit. U.S. 93 provides paved year-round access up the valley. Foothill and Forest side roads can be dusty early and snow-slick late. Cell service is decent near Salmon but drops off in the drainages.
Nearest towns: Salmon, Carmen, North Fork
Seasons & regulations
This page carries no season dates or regulations. Get current rules from the official Idaho sources:
Research sources: IDFG Hunt Planner — Unit 21A · IDFG Hunt Planner — Pronghorn hunts (Unit 21A) · USFS Salmon-Challis National Forest
FAQ
- How big is Unit 21A in Idaho?
- Unit 21A (21A (Salmon)) covers about 246 square miles, ranging from roughly 3,900 to 9,000 feet in elevation. Area is computed from the unit boundary polygon.
- How much public land is in Unit 21A?
- Approximately 65% of the unit is public land. Primary managers: USFS Salmon-Challis NF, BLM, IDL, Private (valley ranches). Always verify ownership boundaries on the ground.
- What species does the catalog list for Unit 21A?
- Pronghorn, Mule Deer, Whitetail Deer, Rocky Mountain Elk, Black Bear. For seasons, tags, and regulations, use the official Idaho agency resources linked on this page — this page carries no regulatory information.
Put Unit 21A on your map.
Boundary lines, public/private ownership, topo, and offline maps for this unit — in Baseline Maps, free for 14 days.