The vast Mojave National Preserve is the third-largest park in the National Park system. The area has a very diverse climate. Some parts of the Park average less than three inches of rain a year; in the mountains, it’s more like ten inches a year. So, the Park has a wide range of natural beauty, from the Kelso sand dunes to the Cima Dome and the Marla Mountains. Be sure to take your Apple Valley rental RV close to the Joshua trees and the Kelso ghost town. Just down the road, you’ll find the Red Rock Canyon State Park. No two canyons or rock formations in this 27,000-acre park are the same. They all have different shapes and colors. That’s especially the case in the spring, when the wildflowers are in bloom. There are other signs of life in the desert as well, including roadrunners, squirrels, and other small mammals. Other activities include hiking and camping, as well as the chance to be alone and have some reflecting time. The Amboy Crater is between Barstow and Needles. Its steep sides rise far above the desert floor, and the flat top is a site to see. Scientists believe this extinct volcano is about 79,000 years old. Park your Apple Valley RV rental near the bottom, and then follow the trail to the top. Then, brag to the folks back home that you climbed a real volcano. There’s zero shade, so come prepared. After your climb, take advantage of facilities like picnic areas and large restrooms. Speaking of old things, you may also want to check out the Mojave Desert Petroglyphs. No one is exactly sure how old these cave drawings are or what they represent. Begin your exploration at the Maturango Museum in Ridgecrest . That’s the best place to learn more about these mysterious drawings. Then, enjoy the guided tour. Be sure to plan ahead. Part of the area is on a military base, so you’ll need security clearance. You’ll also need to leave your Apple Valley motorhome rental at one of the nearby parks.