A 48,438-acre conservation area about 15 miles south of Henderson, Sloan Canyon preserves one of the most significant petroglyph sites in the Mojave Desert. The main attraction is Petroglyph Canyon, a narrow slot canyon whose walls are covered with rock art left by the Ancestral Puebloans and Southern Paiute over a period of more than 3,000 years.
The trailhead is off Interstate 15 south of Henderson. The round trip to the petroglyph canyon takes about two hours on easy to moderate terrain. Bring water — there is none at the site — and plan for an early start in summer. The Bureau of Land Management manages the area; there is no entry fee.