Overview Download the NPS app prior to visiting the park โ trail maps and more! Black Rock Horse Campground is strictly for campers planning to bring horses or mules. It lies among one of the thickest Joshua tree forests in Joshua Tree National Park. Its location on the park's northern perimeter makes it a popular rest stop for horseback riders . Reservations are required for Black Rock year-round. To get the most out of your visit Plan Like a Park Ranger Travelers who enjoy warm, dry winter