The St. Anthony Sand Dunes are one of the most remarkable inland dune systems in North America. Located in eastern Idaho about eight miles west of the city of St. Anthony, these brilliant white quartz dunes stretch across the edge of the Snake River Plain, creating an unexpected desert landscape surrounded by sagebrush, lava fields, and mountain views. The active dune field encompasses roughly 12,000 acres, with dunes rising as high as 400 feet, making them the largest sand dunes in Idaho and a premier destination for outdoor recreation.
The dunes were formed thousands of years ago after the last Ice Age, when ancient lakes receded and prevailing winds carried fine quartz sand across the volcanic plains of eastern Idaho. The result is a constantly shifting landscape of towering ridges, steep bowls, and rolling waves of white sand. Despite appearing barren at first glance, the dunes support several rare plant and insect species, while the surrounding grasslands and sagebrush provide important habitat for elk, mule deer, moose, sage-grouse, and other wildlife.
Today, St. Anthony is best known as one of the West’s premier destinations for off-highway vehicle (OHV) enthusiasts. Riders travel from across the country to tackle the steep climbs, expansive bowls, and famous Deadhorse Bowl, a massive natural amphitheater nearly a mile around. Beyond motorized recreation, visitors also enjoy hiking, horseback riding, photography, camping, wildlife viewing, and winter snowmobiling. The nearby Egin Lakes Campground serves as the primary access point and offers developed camping facilities for visitors spending multiple days exploring the area.
Whether you’re seeking adrenaline-filled dune riding, scenic photography, or simply the experience of walking across an inland sea of brilliant white sand, the St. Anthony Sand Dunes offer one of Idaho’s most unique and unforgettable natural landscapes.
