Freeriding is the original form of freestyle motocross which started in the hills of southern California; due to professional racers such as Jeremy McGrath and Phil Lawrence "play riding" in the hills of reche canyon. It has no structure, and is traditionally done on public land. Riders form natural jumps and drop-offs to execute their tricks on. Some freeriders prefer to jump on sand dunes. In many ways, freeriding requires more skill and mental ability. Notable freeriding locations include Ocotillo Wells, Glamis Dunes and Beaumont in California, and Caineville, in Utah.