www.ohv.parks.ca.gov or by calling the ATV Safety Institute, (800) 887-2887.
The Imperial Sand Dunes are the largest mass of sand dunes in California. They were formed by windblown sands of ancient Lake Cahuilla and extend more than 40 miles in a dune system averaging five miles in width. More than a million off-highway vehicle enthusiasts recreate annually on the Dunes, which can rise more than 300 feet above the desert floor. The Dunes also offer unique scenery, as well as opportunities for solitude and viewing rare plants and animals.