The Imperial Sand Dunes Recreation Area (Glamis), was formed by windblown sands of ancient Lake Cahuilla, the dune system extends for more than 40 miles in a band averaging five miles wide. Dunes often reach heights of 300 feet above the desert floor, providing outstanding opportunities for recreation. A favorite location among off-highway vehicle (OHV) enthusiasts, the area provides a variety of challenges for all-terrain vehicles (ATVs), motorcycles, dune buggies, 4x4s, recreational off-highway vehicles (ROVs), etc. The dunes also offer fabulous scenery, opportunities for solitude, and a home to rare plants and animals.