Bruneau Dunes State Park

Bruneau Dunes State Park is a public recreation and geologic preservation area featuring large sand dunes and small lakes, located northeast of Bruneau and south of Mountain Home, Idaho. The state park is the site of North America's highest single-structured sand dune which is approximately high. The park encompasses and features the Bruneau Dunes Observatory, where visitors can use a telescope for stargazing.
Natural history.
The park's dunes are unique in the Western Hemisphere: where others in the Americas form at the edge of a natural basin, the Bruneau dunes form near the center. The basin has acted as a natural trap for over 12,000 years. The dunes may have started with sands from the Bonneville Flood about 15,000 years ago. With prevailing winds blowing from the southeast 28 percent of the time and from the northwest 32 percent of the time, the dunes stay fairly stable, and unlike most dunes, do not drift far.
The state park includes desert, dune, prairie, lake and marsh habitat. Desert wildlife is prominent along with birds of prey and waterfowl.
Park history.
Land for the park was purchased under the Recreation and Public Purposes Act in May 1967. Additional acreage was acquired in 1980 and in 1984, bringing the park's total area to .
Recreation.
Activities include sandboarding, fishing, birdwatching, camping, hiking, swimming and viewing the stars at the public observatory. No motorized vehicles are allowed on the dunes but climbing and sledding are permitted. There are 7-mile and 9-mile horseback riding trails around the dunes. An educational center offers natural history displays and a gift shop. The astronomical observatory is open Friday and Saturday evenings mid-March through mid-October. Two cabins, 82 RV sites (with water/electricity) and 32 standard sites are available year round in two campgrounds: Eagle Cove Campground and Broken Wheel Campground. An equestrian overnight facility, with corrals, is also available. Fishing for bass and bluegill is popular in the park's small lake. Only non-motorized canoes, rafts and float tubes are allowed.