There are more than 50 hikes in the Black Hills region of South Dakota including Custer State Park, Badlands National Park, and Wind Cave National Parks, as well as throughout the Black Hills National Forest. Also included are trails near Devils Tower National Monument in Wyoming.
Black Hills Non-Motorized Trails although not comprehensive, is a great resource for many of the trails in the area.
https://www.fs.usda.gov/Internet/FSE_DOCUMENTS/fseprd689563.pdf
