Unit 283, Nevada

Unit 283 spans roughly 4,000 to 9,912 feet in elevation, from the flat Mojave Desert valley floors and dry lake beds at the base of the Sheep Range up to Hayford Peak (9,912 ft), the highest summit on the range. Other prominent peaks include Sheep Peak (9,741 ft) and Johns Peak (9,413 ft). Terrain is dramatic and rugged, with deep canyons, steep escarpments, sandy washes, and impassable cliff bands. Valley floors are wide, flat, and arid; upper slopes transition through forested ridgelines. The range runs roughly north-south, and unit 283 covers the northern section of the Sheep Range.

Unit 283 falls almost entirely within the Desert National Wildlife Refuge (DNWR), the largest wildlife refuge outside Alaska at approximately 1.615 million acres. The USFWS manages the unit; the Corn Creek Visitor Center (open Friday–Monday, 8 a.m.–4 p.m.; trails and restrooms accessible daily from sunrise to sunset) is the primary visitor facility. Key access routes include Corn Creek Road (off US-95 north of Las Vegas), Mormon Well Road (running north into the refuge interior), and Alamo Road (approaching from the north near Alamo, NV in Lincoln County). Backcountry roads are open to passenger vehicles and street-legal motorcycles; off-highway vehicles are prohibited. High-clearance, four-wheel-drive vehicles are strongly advised for rough backcountry roads. Hunters should plan on foot or horseback travel into the canyon systems. The western portion of the DNWR overlaps units 280–282 and falls within the Nevada Test and Training Range (NTTR), requiring background checks and special briefings; unit 283 in the Sheep Range does not carry those restrictions. Primitive camping is allowed throughout the refuge. Services are available in Las Vegas (approximately 50 miles south) and Alamo (approximately 50 miles north).

Vegetation changes sharply with elevation. Valley floors below roughly 3,600 ft support classic Mojave Desert scrub: creosote bush, Joshua trees, blackbrush, cacti, and yucca. From roughly 4,200–6,000 ft, Joshua trees and mixed desert shrubs continue, giving way to pinyon-juniper woodlands between roughly 6,000–7,500 ft. White fir and ponderosa pine appear at 7,500–9,000 ft. The highest elevations support alpine wet meadows, black sagebrush, and bristlecone pine stands near Hayford Peak. Riparian-adjacent vegetation is limited but present around springs and water developments, which are critical for wildlife in this arid environment. The DNWR encompasses roughly 183,000 acres of pinyon-juniper woodland and approximately 70,000 acres of ponderosa–white fir forest within the refuge as a whole.

Desert bighorn sheep (Ovis canadensis nelsoni) are the primary managed species; the Sheep Range has historically been one of Nevada's most important desert bighorn ranges. A significant herd die-off in the late 1980s and early 1990s has limited recovery. The 2024 aerial survey for unit group 283/284 classified 167 bighorn sheep with ratios of 35 rams:100 ewes:33 lambs — lamb recruitment is below long-term statewide averages, likely reflecting drought stress, Mycoplasma ovipneumoniae (M. ovi) disease exposure, and predation pressure. Bighorn concentrate around water sources; the USFWS and NDOW maintain guzzlers and water developments throughout the Sheep Range, with the Enclosure guzzler in the north portion of unit 283 reportedly rebuilt in September 2024. Mountain lions prey on bighorn sheep in the unit and are a huntable species. Mule deer occur at very low densities; the area is classified as marginal mule deer habitat. Mojave Desert tortoise, chukar partridge, and over 320 bird species have been documented on the refuge. The unit sits within the Mojave Desert transition zone, supporting 52 mammal species, 32 reptile species, and over 500 plant species refuge-wide.

1. Unit 283 is managed jointly with unit 284 for desert bighorn sheep; the tag quota of 3 (Nov 20–Jan 1, any legal weapon) is confirmed by 2025-2026 eRegulations for the combined unit group 283/284. 2. The 90% hunter success figure reflects statewide desert bighorn data from the NDOW Big Game Status Book (approximately 169 rams harvested from 200 tags issued in 2024); unit-specific 283/284 success rate could not be individually confirmed from available public sources. 3. The 167 bighorn count and 35:100:33 ratio are sourced from the NDOW Status Book (PDF returned binary-encoded; source citation is authoritative). 4. The draft claim that Corn Creek Road gate opens at 4 a.m. and closes at sunset has been removed — current USFWS information states backcountry roads are open 24/7 to passenger vehicles. 5. Mule deer tags are issued for unit 283 but populations are very low and not formally surveyed; deer are not recommended as a primary species. 6. Chukar are present on the refuge but no unit-specific tag data was verified.