Unit 4

Key navigation landmarks include Ortigalita Peak and the Las Aguilas Mountains as dominant ridgeline features useful for orientation and glassing. Pacheco Pass and Panoche Pass serve as major travel corridors and geographic reference points. San Luis Reservoir and Los Banos Reservoir are significant water features visible on the landscape and critical for planning water access.

Dunne Ridge, Schoolhouse Ridge, and Mustang Ridge provide ridge-running routes through the unit. Multiple named flats—Carrisalito, Wisenor, Dairy—mark plateau areas that break the rolling terrain. Creeks like Ortigalita Creek and Quien Sabe Creek serve as natural travel corridors and occasional water sources.

The unit spans from 167 feet in valley bottoms to 3,757 feet on ridgetops, with most terrain in the lower-to-middle elevation range. Habitat is predominantly open—rolling grasslands and annual grassland with scattered oak woodlands and sparse digger pine dominate. Lower basins are largely treeless plains with scattered shrubland; ridges support denser oak and chaparral.

The sparseness of forest (3.7% combined across all terrain types) means views are generally long and vegetation cover limited. Summer heat and dryness stress vegetation; winter rains green the country briefly before summer dormancy sets in.

The road network is moderate but fragmented due to private ownership patterns. At 0.66 miles of road per square mile, the unit has fair connectivity but most routes cross private land. Major highways (US 152, CA 33) bound the unit and provide staging access from Hollister, but interior access is limited.

Most hunters will find themselves constrained to public lands, established road corridors, and landowner-permission areas. The heavy private ownership (92.9%) means foot traffic pressure concentrates on accessible public parcels and traditional hunting corridors. Early season typically sees moderate pressure; late season lighter as most hunters exhaust easy access.

Interior country away from main roads sees limited use.

Unit 4 encompasses roughly 784 square miles of coastal California foothills between the Central Valley and the Diablo Range. The terrain spans from low-elevation valley floors near Hollister east toward the higher ridges of the Las Aguilas Mountains and Ortigalita Ridge. This is working ranch country with significant private holdings—92.9% private land makes access a primary challenge.

Geographic anchors include Pacheco Pass and Panoche Pass as major route corridors, with San Luis Reservoir and Los Banos Reservoir marking significant water features. The unit sits in a rain-shadow zone with hot, dry summers and winter-spring moisture.

Water is seasonal and scattered—reliable during winter and early spring, scarce by midsummer. Major creeks including Ortigalita Creek, Quien Sabe Creek, and Salt Creek flow seasonally and support riparian vegetation that concentrates wildlife. San Luis Reservoir and Los Banos Reservoir are substantial bodies of water that anchor water strategy and attract animals during dry periods.

Smaller reservoirs (Hawkins Lake, Diamond Lake, Bear Hide Lake) provide secondary water sources. Multiple named springs—Carrisalito Springs, Windmill Spring, Shadow Spring, Willow Spring—offer additional water points, though reliability varies seasonally. North Fork Los Banos Creek drains the northern portions and provides important year-round corridor water.

Elk are the primary species for this unit and use the rolling foothill terrain seasonally. Winter and early spring bring animals to lower elevations and water sources as they move between higher range and protected valleys. The sparse forest and open grassland means long-distance glassing from ridges like Dunne and Schoolhouse Ridge, but cover for stalking is minimal—plan approach routes carefully.

Creeks and reservoirs concentrate elk during dry months; mid-elevation oak woodlands provide food and rest areas. Success hinges on gaining access through private land or identifying and hunting public ground thoroughly. Early season (late summer/fall) finds elk at higher ridges before water stress; winter pushes them to creeks and reservoirs.

The terrain complexity (6.2/10) reflects the access puzzle rather than extreme topography.