Rainbow Basin Natural Area is located eight miles north of Barstow, California, off Irwin Road (not Fort Irwin Road). The main access route is Fossil Bed Road Rainbow Basin and is designated as an Area of Critical Environmental Concern due to landscape features and paleontological resources in the area. Many visitors come to see exciting multi-colored rock formations and walk the scenic canyons. A variety of desert wildlife is found in the Rainbow Basin Natural Area, including the desert tortoise. Visit the website for more information.