The park service discourages canine visitors with this website warning: “While pets are allowed in the park, their activities are restricted. They must be on a leash at all times and cannot be more than 100 feet from a road, picnic area, or campground; they are prohibited from trails, and they must never be left unattended—not even in a vehicle.” Here is a more detailed message, as directed to rock climbers: “Leave Your Dog at Home. While pets are allowed in the park, their activities are restricted. They must be on a leash at all times and cannot be more than 100 feet from a road, picnic area, or campground. They are prohibited from trails, and they must never be left unattended—especially in a vehicle. Desert heat can be deadly to your pet. Park temperatures peak at over 100°F, turning the inside of your car into an oven. If your dog is at the base of a climb while your partner is bringing you up, then your dog is unattended. Your dog may be a model of good behavior, but dogs are predators and their mere presence stresses wildlife. Dog waste poses the same disposal problems as human waste, and even a tied dog can destroy vegetation.”

That said, there is still plenty to experience at Joshua Tree with your dog along. Much of the park’s iconic scenery is visible from a car window—those massive boulder formations and twisted Joshua trees are stunning even without leaving the pavement. Picnic areas offer shaded spots where you can stretch and relax together, and designated roadside viewing areas let you walk your dog on-leash while taking in the landscape. Beyond that, more than 500 miles of backcountry roads open to vehicle traffic also allow dog walkers, giving you options for exploring the park’s quieter corners.

The real key to visiting with your dog is preparation and honesty about the constraints. The desert heat here is genuinely dangerous; even a short time in a parked car can become life-threatening. Pack significantly more water than you think you’ll need—both for you and your dog. If you’re planning rock climbing or serious hiking, leaving your dog behind really is the safer choice. But for a day of scenic driving, picnicking, and short walks on permitted roads, Joshua Tree can work with advance planning and realistic expectations about where your dog can and cannot go.