Qualla: Racetrack Playa Sailing Stones

Racetrack Playa Sailing Stones: Introduction

Mon, 12 Jan 2026 00:00:00 GMT

Photo credit Tahoenathan, CC BY-SA 3.0. In one of the most remote corners of Death Valley National Park, rocks move across a dry lakebed without human or animal intervention. The Racetrack Playa is home to the 'sailing stones' - rocks ranging from pebbles to boulders that leave long trails behind them as they travel across the flat, cracked surface. For decades, no one had ever seen the stones move, but the trails proved they did - some tracks stretch over 1,500 feet. The mystery spawned theories from magnetic fields to aliens to elaborate hoaxes. The truth, revealed in 2014 when researchers finally caught the stones on video, was stranger and more mundane: ice sheets forming on flooded playa, pushed by light winds, carrying the rocks along. The stones sail on frozen water.

Image: Tahoenathan | CC BY-SA 3.0

Racetrack Playa Sailing Stones: The Playa

Mon, 12 Jan 2026 00:00:00 GMT

Photo credit Matthew O'Brien, Public domain. Racetrack Playa is a dry lakebed in the northern part of Death Valley National Park, at 3,700 feet elevation - relatively cool by Death Valley standards. The playa is remarkably flat - one of the flattest places on Earth - measuring about 2.8 miles long and 1.3 miles wide. When w...

Image: Matthew O'Brien | Public domain

Racetrack Playa Sailing Stones: The Mystery

Mon, 12 Jan 2026 00:00:00 GMT

Photo credit Nzeemin, CC BY-SA 3.0. The sailing stones were documented at least as early as 1915, and the mystery captured scientific and public imagination for a century. The stones clearly moved - their trails proved it - but no one had ever witnessed the motion. Theories proliferated: strong winds (but some rock...

Image: Nzeemin | CC BY-SA 3.0

Racetrack Playa Sailing Stones: The Solution

Mon, 12 Jan 2026 00:00:00 GMT

Photo credit Public domain. In 2014, researchers Ralph Lorenz and Richard Norris finally caught the sailing stones moving. Using GPS trackers and time-lapse cameras, they documented the mechanism. In winter, rainwater can flood the playa to a few inches depth. On cold nights, thin ice sheets form. As the ic...

Image: Public domain

Racetrack Playa Sailing Stones: The Access

Mon, 12 Jan 2026 00:00:00 GMT

Photo credit Public domain. Reaching Racetrack Playa is an adventure in itself. The playa lies at the end of a 27-mile rough dirt road that requires high-clearance vehicles and often 4WD. There are no services, no water, and no cell signal. Flat tires are common; rescue is difficult. Visitors who reach the ...

Image: Public domain

Racetrack Playa Sailing Stones: Visiting Racetrack Playa

Mon, 12 Jan 2026 00:00:00 GMT

Photo credit Deathvalleysky_nps_big.jpg: Dan Duriscoe, for the en:U.S. National Park Service. derivative work: Nevit Dilmen (talk), Public domain. Racetrack Playa is located in the northern part of Death Valley National Park, accessible via Racetrack Valley Road from Ubehebe Crater. The road is 27 miles of rough dirt requiring high-clearance vehicles; check current conditions at the Furnace Creek Visitor Center. Allow 2-3 h...

Image: Deathvalleysky_nps_big.jpg: Dan Duriscoe, for the en:U.S. National Park Service. derivative work: Nevit Dilmen (talk) | Public domain