A field of sand dunes sits on the east bank of the Columbia River a few miles downstream of Vantage, where Crab Creek meets the river through a notch in the basalt. The sand is river sand, deposited by the Columbia and reworked across roughly eighteen hundred acres by the prevailing southwesterly wind. The Washington Department of Natural Resources keeps the area as an open recreation site, primarily for off-road vehicles, and on summer weekends the dunes are noisy. On a still spring morning before the riders arrive the wind ridges are sharp and clean, and the basalt cliffs across the river hold the early light.