The Cement Flats Imperial Sand Dunes OHV Camping Area in California is a popular spot for off-road enthusiasts. The campground is first-come, first-serve and offers stunning views of the surrounding sand dunes. Nearby activities include hiking, sandboarding, and ATV riding. The campground amenities include vault toilets, fire rings, and picnic tables. There are 80 campsites available, but no reservations are taken. The best time to visit is in the fall or winter, with temperatures averaging around 70°F during the day and 40°F at night.