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Badlands Loop Road, United States
The Badlands Loop Road (Route 240) is a 31-mile scenic road through the North Unit of Badlands National Park in southwestern South Dakota, branching off I-90 at Wall (exit 110) or the Cactus Flat interchange (exit 131). The road traverses one of the world's richest Oligocene epoch fossil beds — 75 million years of geological layers exposed by erosion into a surreal landscape of striped buttes, pinnacles, and spires rising above the surrounding prairie. The Pinnacles Overlook at the western entrance offers a sweeping first view of the formations. The road descends through a series of 14 named overlooks, each revealing different geological layers in shades of cream, pink, red, and gray. The Door Trail and Window Trail (near the Ben Reifel Visitor Center) provide short walks directly into the formations. Bighorn sheep, bison, and prairie dogs are commonly spotted — the Roberts Prairie Dog Town has hundreds of residents visible from a roadside pullout.
explore by interest
Drive east to west (Cactus Flat entrance to Pinnacles) to save the most dramatic panorama for the end. The 31-mile loop takes about one hour without stops; plan 2-3 hours with overlooks and short trails. Gas up in Wall or Interior — there are no services in the park. Sunrise and sunset transform the formations with golden and pink light. Summer temperatures can exceed 100°F on the exposed overlooks — carry water.
May through October for the best weather and road conditions. Late May for wildflowers and newborn bison calves. September and October for mild temperatures, golden light, and thin crowds. Summer is hot but dramatic thunderstorms create spectacular photography. The road is open year-round but can be snow-packed in winter.