The San Rafael Swell is a fun place to ride your horse, your ATV, your motor bike, and drive your 4X4 truck. It is sand and dirt as far as your eye can see. It is a huge hole in the ground with lots of neat stuff to see and do. The official words are "a kidney-shaped up thrust of about 900 square miles of desert, domes, steep ridges, and canyons, almost entirely within Emery County. The roadway from the top to the bottom cuts though this large area. It is almost un-believable at the size of the reef, as it stretches for miles across the desert floor. "