Sailing stones, sliding rocks, and moving rocks all refer to a geological phenomenon where rocks move in long tracks along a smooth valley floor without human or animal intervention. They have been recorded and studied in a number of places around Racetrack Playa, Death Valley, where the number and length of travel grooves are notable.
There is something utterly magical about the sailing stones of the Racetrack Playa (sometimes called the Devil's Racetrack) in Death Valley California. Scattered about the desert are large rocks with mysterious trails left behind them. The trails show that these rocks have rolled and zig-zagged across the ground, sometimes for as long as 860 feet.