Joshua Tree gets the crowds. Two hours away, on California's border with Nevada, there's a nearly 21,000-acre stretch of desert where you can camp under volcanic spires and count the other visitors on one hand. Castle Mountains National Monument has just 24 Google reviews — that's how far off the radar it stays.
The monument sits on the edge of Mojave National Preserve, reachable only by dirt roads from Nevada State Road 164 or Lanfair Road. You'll need a high-clearance 4WD; there's no public transport and no way in without your own vehicle. The payoff for the rough drive is a landscape that easily rivals its famous neighbour: sprawling Joshua tree forests, twisted juniper, and Castle Peaks, a jagged cluster of volcanic spires rising out of the flat desert like the ramparts of a ruined fortress.
There are no marked trails, so navigation skills matter — you're free to wander among the cacti and brush, but you need to know where you're going. The desert is livelier than it looks. After spring rains, wildflowers carpet the ground, and the area supports desert bighorn sheep, mountain lions, golden eagles and prairie falcons.
Human history runs deep here too. The gold-mining town of Hart was founded in 1908 and abandoned just seven years later; its remnants are still explorable. Rock art and archaeological sites record thousands of years of presence by the Fort Mojave and Chemehuevi Tribes.
Camping is the main draw. Mid-Hills Campground and Hole-in-the-Wall Campground each take 8 people and 2 vehicles on a first-come, first-served basis, while the larger Black Canyon Equestrian and Group Campground requires advance booking. Dispersed camping is allowed anywhere in the monument provided you follow Leave No Trace principles. With no visitor centres, no facilities and no entry fee, this is about as self-sufficient as desert camping gets — bring all your own water, food, sturdy boots and warm layers, because desert nights can drop close to freezing even when days are mild.
For anyone who loves Joshua Tree's scenery but not its traffic, this is the alternative: dark night skies, genuine silence, and no queues for a campsite. Just don't arrive in a hatchback.