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Badlands National Park: Castle-Medicine Root Loop

Watch thriving bison herds while surveying million-year-old glacial architecture on this 4.2-mile lasso loop through the largest untouched mixed-grass prairie in North America.

Trip Tools

To Trailhead

From Sioux Falls, follow I-90 W; exit S onto SD 377 and enter park. Turn R onto Badlands Loop Rd.; R @ Saddle Pass Trail parking lot.

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