Unit 821 Nine Mile, Gray Canyon
The deep, arid canyon country of the lower Green River — home to Utah's Gray Canyon bighorn core herd and a remote, walk-in mule deer and elk hunt
Eastern Utah — Desolation-Gray Canyons / Green River · Last reviewed 2026-07-12
Area
513
sq mi
Public land
72%
approx.
Elevation
4,000–9,000
feet
Motorized
limited
access
Overview
The Nine Mile, Gray Canyon unit occupies the dry, cliff-walled lower reaches of the Green River corridor near the town of Green River, at the southern end of the greater Nine Mile complex in Carbon, Duchesne and Emery counties. This is the heart of the Desolation-Gray Canyons — a nearly 5,000-foot-deep river gorge rivaling the Grand Canyon in steepness — and it holds Utah's Gray Canyon bighorn core herd, established by transplants along the Price River and Desolation Canyon and hunted as a coveted once-in-a-lifetime tag. The unit also carries mule deer and elk across its rugged ridges and side canyons, with the riparian ribbon along the river providing critical wintering habitat. Access is largely public BLM but rugged, remote, and pinched by private ranches near the Green River bottoms.
Terrain
Steep, deeply incised canyon country dropping to the Green River near 4,000 ft and climbing over broken benches and rims toward high ridges approaching 9,000 ft. Sheer cliffs, talus, and side-canyon systems draining into Desolation and Gray Canyons dominate.
Cover: Dry desert bighorn-type habitat — sagebrush, shadscale and desert grasses on the benches, pinyon-juniper on the mid-slopes, and pockets of aspen and conifer on the highest ground. A narrow riparian corridor of willow, cottonwood and box elder lines the Green River and is critical winter range for deer and elk.
Landmarks: Gray Canyon · Desolation Canyon · Green River · Range Creek · Swasey's Boat Ramp · town of Green River / I-70 exit 164 · Price River corridor
Access
Predominantly BLM canyon and rim country (much of it the Desolation-Gray Canyons management area) laced with SITLA state-trust sections that are open to hunting, but with private ranch and farm flocks concentrated in the Green River Valley near the town of Green River — the very low ground adjacent to prime bighorn habitat. Much of the interior is roadless and reached only on foot or by float trip down the Green River; expect long, rugged approaches. Carry a land-ownership GPS layer and respect private inholdings near the river.
Managers: BLM, SITLA, private
Access points: I-70 exit 164 / town of Green River · Swasey's Boat Ramp (Green River access) · Hastings Road / Nefertiti area · Range Creek drainage (north side, with access limits) · US-6 corridor near Wellington/Green River
Species notes
Bighorn Sheep
common trophyThe marquee hunt. Gray Canyon holds the core bighorn herd of the greater Nine Mile unit — the vast majority of the sheep live in the lower reaches of Gray Canyon near the town of Green River, in relatively dry, desert-type habitat established by transplants along the Price River and into Desolation Canyon. It is a once-in-a-lifetime bighorn tag and a bucket-list draw.
- →Focus on the steep cliff bands, talus and rim country of lower Gray Canyon near the river
- →Consider a Green River float to access and glass otherwise unreachable canyon walls
- →Spend days behind a spotting scope evaluating rams before committing
- →Work the escape-terrain edges early and late when sheep feed off the crags
Mule Deer
common qualityPart of the well-known greater Nine Mile general-season deer country, with deer scattered in sporadic densities through the canyon-and-ridge terrain. The riparian corridor and lower benches are important winter range, and remote, hard-to-reach pockets can hold good bucks.
- →Glass the pinyon-juniper benches and canyon rims at first and last light
- →Get away from the limited roads — the best deer sit behind long walk-ins or river access
- →Key on browse pockets and the transition between feeding benches and cliff bedding
- →Watch the winter-range corridor along the river later in the season
Rocky Mountain Elk
limited qualityElk use the higher ridges and side drainages (including the Range Creek country) of the southern Nine Mile complex. Numbers are lower and access is tough, but remote basins let bulls mature.
- →Hunt the higher aspen and conifer benches and the heads of side canyons
- →Locate bugling bulls from high glassing points at dawn
- →Target remote, roadless pockets where hunting pressure is minimal
Cougar
common opportunityThe deer-rich canyon country supports cougars, hunted with hounds on winter tracking snow.
- →Cut for tracks along canyon rims and the few access roads after fresh snow
- →Focus on deer wintering benches near the river corridor
Pro tips
- →If you draw the sheep tag, scout lower Gray Canyon near Green River where the bulk of the herd lives — and consider a float to reach the far canyon walls
- →Load a current ownership GPS layer; private ranches pinch the low ground near the river
- →Plan for genuine desert-canyon conditions: carry water, sun protection, and a self-recovery plan
- →Look past the roads — foot and river access open the least-pressured country
- →Time deer effort to the rut and the move onto winter range for better buck visibility
Watch out for
- !Private ranches and farm flocks crowd the Green River bottoms adjacent to prime habitat — verify boundaries
- !Much of the unit is roadless; some country is only reachable by foot or river float
- !Extreme, cliff-broken terrain — plan stalks and retrieval carefully
- !Hot, dry desert canyon with very limited water early
- !Clay roads impassable when wet; storms can strand vehicles
- !River-based access requires permits and river-safe logistics
Logistics
Base out of the town of Green River right off I-70, or from Price/Wellington to the northwest. Provision fully in town — the canyon interior has no services and cell coverage vanishes below the rims. Much of the best country is reached only on foot or by floating the Green River (a permitted Desolation-Gray Canyons trip), so plan self-sufficient backcountry or river logistics, high-clearance travel to the road ends, and careful navigation around private ground near the river.
Nearest towns: Green River, Price, Wellington, East Carbon, Wellington
Seasons & regulations
This page carries no season dates or regulations. Get current rules from the official Utah sources:
Research sources: UDWR Nine Mile Bighorn Sheep Unit Management Plan (Gray Canyon / Jack Creek) · BLM — Desolation Gray Canyons of the Green River · GOHUNT — Utah Nine Mile Deer Unit Profile · American Rivers — Desolation-Gray Canyons of the Green River
FAQ
- How big is Unit 821 in Utah?
- Unit 821 (Nine Mile, Gray Canyon) covers about 513 square miles, ranging from roughly 4,000 to 9,000 feet in elevation. Area is computed from the unit boundary polygon.
- How much public land is in Unit 821?
- Approximately 72% of the unit is public land. Primary managers: BLM, SITLA, private. Always verify ownership boundaries on the ground.
- What species does the catalog list for Unit 821?
- Bighorn Sheep, Mule Deer, Rocky Mountain Elk, Cougar. For seasons, tags, and regulations, use the official Utah agency resources linked on this page — this page carries no regulatory information.
Put Unit 821 on your map.
Boundary lines, public/private ownership, topo, and offline maps for this unit — in Baseline Maps, free for 14 days.