Unit D12 Zone D12
Vast BLM desert where a few burro mule deer live tied to water and washes
Southeastern California — Colorado Desert & lower Colorado River ranges · Last reviewed 2026-07-12
Area
8,355
sq mi
Public land
75%
approx.
Elevation
-200–4,500
feet
Motorized
extensive
access
Overview
Zone D-12 is an enormous low-desert unit sprawling across Imperial, Riverside and San Bernardino counties, from Twentynine Palms and the Whipple Mountains south along the Colorado River to the Mexican border. It is dominated by public BLM land — the majority of the zone — with fourteen wilderness areas and scattered private holdings mixed in. The deer are Burro (Desert) mule deer living at extremely low density, concentrated in ironwood and palo verde desert washes and near permanent water. Population trends are stable, but this is a hard, low-success hunt where a handful of trophy bucks are taken each year across a huge landscape.
Terrain
Flat, rolling valley floors, dune fields and desert washes at or near sea level rising to steep, rocky desert mountain ranges and buttes.
Cover: Desert plant communities from dunes and creosote/desert scrub to Joshua tree woodland and riparian desert forest; deer key on washes holding ironwood and palo verde.
Landmarks: Whipple Mountains · Riverside Mountains · Chocolate Mountains · Trigo Mountains · Chuckwalla Mountains · Milpitas Wash · Bradshaw Trail · Colorado River corridor
Access
Mostly open public BLM land with abundant dirt-road access, but obtain BLM open-route maps before venturing in to stay on legal routes. Hunting is allowed in the fourteen wilderness areas (no vehicles). No access or hunting in the Chocolate Mountain Aerial Gunnery Range or Joshua Tree National Park. Get written permission for any private parcels.
Managers: BLM (majority — El Centro, Needles, Palm Springs field offices), Private holdings (scattered), Military (Chocolate Mountain Aerial Gunnery Range — closed), NPS (Joshua Tree NP — no hunting)
Access points: Interstate 10 · Highway 62 · US Highway 95 · Highway 78 (Milpitas Wash / Bradshaw Trail) · Ogilby Road / Indian Pass Road · Havasu Landing Road · Rice Valley Road
Species notes
Mule Deer
limited opportunityBurro (Desert) mule deer at very low, scattered densities tied to permanent water and green washes. Official hunter success runs about 3-5%; most deer are taken south of Interstate 10, with a few in the Whipple and Riverside mountains to the north.
- →Locate permanent water sources and hunt the ironwood/palo verde washes radiating from them
- →After rain, deer disperse onto vegetation flushes; in dry years they stay near water
- →Once opening-day pressure hits, glass into the mountains and rocky breaks where bucks retreat
- →Cover ground and glass hard at first and last light — densities are too low to still-hunt blind
Bighorn Sheep
limited trophyDesert bighorn inhabit the rugged desert ranges within and around the zone (e.g., Chuckwalla, Chocolate and lower Colorado River mountains), available only through California's premium limited draw for a handful of tags.
- →A once-in-a-lifetime premium draw hunt — apply and build points; scout rocky, precipitous range cores near water
- →Glass steep desert escarpments and canyons at dawn
Pro tips
- →Pull BLM open-route and surface-management maps (Yuma, Trigo Mountains, Salton Sea, El Centro) before the trip
- →Build your hunt around water — deer concentrate near permanent sources in the dry desert
- →Focus effort south of Interstate 10 where most harvest occurs
- →Carry far more water than you think you need and expect long miles between deer
Watch out for
- !Extremely low deer density and low success — manage expectations
- !No access to the Chocolate Mountain Aerial Gunnery Range; no hunting in Joshua Tree National Park
- !Heat, waterless stretches and deep sand — 4WD, recovery gear and ample water are essential
- !Do not camp/linger within 200 yards of desert water sources (Title 14 §730 violation)
- !Stay on legal BLM routes to avoid wilderness/closure conflicts
Logistics
Services cluster in the highway towns — Needles and Blythe along the Colorado River, Brawley and El Centro to the south, and Yuma, Arizona. Most of the zone is open to dispersed camping on BLM land (check restrictions). Four-wheel-drive is strongly recommended for sandy washes and unimproved roads; enter with full fuel tanks and carry a shovel, good spare, and abundant extra water — this is remote, waterless desert.
Nearest towns: Blythe, Needles, Brawley, El Centro, Yuma (AZ)
Seasons & regulations
This page carries no season dates or regulations. Get current rules from the official California sources:
Research sources: CDFW Zone D-12 General Deer Hunting Information (2025) · CDFW Imperial Deer Study — Deer Zone D-12, Burro Deer Herd · CDFW Deer Hunting Zones
FAQ
- How big is Unit D12 in California?
- Unit D12 (Zone D12) covers about 8,355 square miles, ranging from roughly -200 to 4,500 feet in elevation. Area is computed from the unit boundary polygon.
- How much public land is in Unit D12?
- Approximately 75% of the unit is public land. Primary managers: BLM (majority — El Centro, Needles, Palm Springs field offices), Private holdings (scattered), Military (Chocolate Mountain Aerial Gunnery Range — closed), NPS (Joshua Tree NP — no hunting). Always verify ownership boundaries on the ground.
- What species does the catalog list for Unit D12?
- Mule Deer, Bighorn Sheep. For seasons, tags, and regulations, use the official California agency resources linked on this page — this page carries no regulatory information.
Put Unit D12 on your map.
Boundary lines, public/private ownership, topo, and offline maps for this unit — in Baseline Maps, free for 14 days.