Unit 181 covers the Excelsior Mountains, the Pilot Mountains, the Gabbs Valley Range, and surrounding country in west-central Nevada between Hawthorne, Mina, and Tonopah—a stretch of high desert with isolated mountain blocks and big alkaline basins. Elevations run from about 4,200 feet on the Soda Springs Valley playa to over 8,800 feet on Excelsior's high peaks and 8,463 on Pilot Peak. The Excelsiors and Pilots are dry, rugged, and more openly volcanic than the timbered ranges further north—less aspen, more pinyon-juniper and mountain mahogany, with limber pine clinging to the highest crests. Vegetation grades from creosote and saltbush on the basin edges (this is starting to feel like Mojave country) through sage and bitterbrush, into pinyon-juniper benches and mahogany on the rocky shoulders. Water is genuinely scarce. BLM dominates with small slivers of Humboldt-Toiyabe NF on the highest country. US 95 is the spine running Hawthorne to Tonopah; Highway 360 cuts off toward Lida and the southern country; access roads off all of these are graded gravel that goes nasty with rain. Hawthorne is your supply town—gas, the Hawthorne Convention Center if you need a motel, basic groceries—and the Hawthorne Army Depot that surrounds the town limits some access; pay attention to signage. Tonopah is fine to the east. Cell service follows US 95 and dies elsewhere. Mule deer and pronghorn share the country; desert bighorn live the Excelsior cliff bands with very limited tags. Carry water—real water, two gallons a day per person—because the country is genuinely dry and hot well into October.