Box Elder, Newfoundland Mtn, Utah

The Newfoundland Mountains rise abruptly from the Great Salt Lake Desert playa, with the valley floor at approximately 4,200 feet elevation climbing to Desert Peak at 7,005 feet (the range's only officially named summit, per Wikipedia). The range is crescent-shaped, roughly 20 miles long north-to-south and 3–5 miles wide, forming a single narrow ridgeline that decreases in elevation toward the south. Rock is predominantly Precambrian and Paleozoic limestone, quartzite, and dolomite; the rugged, steep-sloped escape terrain is exactly the habitat characteristic that supports bighorn sheep. Ancient Lake Bonneville shorelines are visible as horizontal benches on the lower slopes. The surrounding basin is salt flat and playa with no tree cover.

Access to the Newfoundland Mountains requires traversing more than 40 miles of dirt roads ranging from maintained gravel to rough, rutted four-wheel-drive tracks. Routes approach from Lakeside (about 10 miles to the east) and from Lucin to the west (about 32 miles). Four-wheel drive with high clearance is strongly recommended for side roads accessing the mountain base; the railroad grade access road can be impassable after wet weather. The southern approximately 2.5 miles of the range lies within the Utah Test and Training Range (Lakeside Military Area, operated by Hill Air Force Base) — this area is CLOSED to public access and hunting. BLM manages 63.5% of the modeled bighorn habitat (~67,388 acres), Department of Defense controls 16.7% (~17,693 acres), private land is 10.7% (~11,402 acres), and Utah State Institutional Trust Lands account for 9.1% (~9,620 acres). The unit excludes all military installations per its legal boundary description.

The lower slopes and surrounding basin are stark salt desert shrub and playa, transitioning upward to sparse desert shrubland — principally shadscale, greasewood, and desert bunchgrasses — with scattered mountain mahogany and sagebrush on mid-elevation slopes. The management plan notes that conifer encroachment has occurred in some areas and that the UDWR cooperates with the BLM on mechanical treatments and prescribed fire for conifer removal to maintain open bighorn habitat. Pinyon-juniper, if present, is limited. Surface water is described in the management plan as a limiting factor for bighorn sheep.

Rocky Mountain bighorn sheep are the focal species, with a population estimated at approximately 313 animals as of the 2018 aerial survey (population objective: 300–350). The herd was reestablished beginning in 2001 with 31 transplanted animals from Antelope Island, Utah and Hart Mountain, Nevada, following extirpation of the historic population. Sheep occupy the rugged upper ridgeline and cliff faces of the Newfoundland Mountain range and have been used as a source herd for transplants to other areas of the state. Mule deer occur as a sympatric species on the landscape in limited numbers but are not the management focus of this boundary. Mountain lions (cougars) are identified as the anticipated primary predator of bighorns on this range, though numbers are described as few or absent in the areas currently occupied by sheep. Domestic sheep allotments in the area have been retired, which was a prerequisite for the bighorn reintroduction.