Zone X3a, California

CDFW describes Zone X-3a as covering a large geographic area with terrain that "can be very steep and rugged." The zone spans the high-desert Modoc Plateau and adjacent mountains; named productive features include Adin Mountain, Fox Mountain, Knox Mountain, Likely Mountain, Snag Mountain, Washington Mountain and Whitinger Mountain. CDFW does not publish specific elevation figures for the zone, but notes deer move to higher elevations in spring and drop below the snow line with fall storms.

Zone X-3a spans portions of Lassen and Modoc counties and is served by three state highways that form its rough boundaries and provide the main staging corridors: US-395 along the eastern edge (reaching Alturas), SR-299 across the northern tier (passing through Adin, where the Modoc National Forest Big Valley Ranger District office sits at 508 South Main Street/Hwy 299), and SR-139 through the central zone. From these paved spines, county roads and USFS/BLM roads branch into public land blocks. On the Modoc National Forest Big Valley Ranger District (headquarters in Adin), named campgrounds that serve as basecamp/staging areas include Ash Creek Campground (reached by heading east from Adin on County Road 527/Forest Road 39N08 approximately 7 miles, then left on County Road 22; the Red Tail Rim Trail south trailhead is nearby), and Lower and Upper Rush Creek Campgrounds (north from Adin via County Road 198, then Rush Creek Drive — a rough dirt road). On the Modoc National Forest Warner Mountain Ranger District (Cedarville), the South Warner Wilderness is accessed non-motorized only; trailheads include Mill Creek Falls Campground (paved road access south on US-395 ~18 miles to Likely, then east on County Road/Jess Valley Road 64), Blue Lake Campground, East Creek Campground (horse camping with corrals; access via Forest Road 64 area), and Bear Camp Flat Trailhead (4WD recommended, via Forest Road 64 from Eagleville). The Modoc National Forest Doublehead Ranger District (Tulelake) covers the zone's northwest; SR-139 is the primary corridor for that portion, with Medicine Lake Recreation Area as a notable staging point. BLM lands within the zone are managed by the Applegate Field Office (main field station in Cedarville; formerly Alturas Field Office, 530-233-4666) and the Eagle Lake Field Office (Susanville, 530-257-0456). The zone contains extensive road access overall — CDFW notes there is likely no area more than five miles from a road — but many dirt and county roads become impassable in wet weather or after early autumn snowfall, and 4WD/high-clearance is advisable. Dispersed camping is permitted on USFS and BLM lands with required fire permits. Approximately 53% of the zone is public land; the remainder is private and requires written landowner permission. Additional hunting opportunities on private land may be available through the CDFW Private Lands Management (PLM) program and the SHARE program (wildlife.ca.gov/hunting/share).

Per CDFW, vegetation is highly varied, "ranging from low sage, sagebrush, bitterbrush, aspen, juniper, and hardwood-conifer to conifer habitats," and can be extremely dense in places. Deer respond favorably to disturbances that enhance brush (wildfire, timber harvest); riparian areas, recently burned areas, and re-sprouted clear-cuts are noted as good habitat, while older decadent brushlands and dense forest hold lower densities. Best hunting is near stands of bitterbrush, mountain mahogany, or tall sagebrush.

The subspecies is Rocky Mountain mule deer, and CDFW classifies the Zone X-3a deer as migratory. Deer generally move to higher elevations in late spring, remaining until the first heavy fall storms force them down below the snow line; this downward movement often occurs during the hunting season, so hunters should be prepared to follow deer to lower areas after storms. CDFW considers the population "stable to slightly declining," well below late-1960s/1970s levels, part of a long-term western mule deer decline attributed to land-management practices that precluded fire and reduced habitat quality, with short-term swings driven by weather and forage. (Rut timing is not specified by CDFW for this zone; the general Rocky Mountain mule deer rut peaks in November, after the X-3a general season closes.)