The Centennial Trail is over 100 miles long and was built in 1989 to represent the 100th anniversary of South Dakota's statehood. This part of the trail begins at the Samelius Trailhead located east of Hill City on Highway 16. The route travels through the Black Hills National Forest and climbs halfway through the hike to offer amazing views of Sheridan Lake. Most people will do this route as a one-way day trip with necessary vehicle arrangements, but it can also be done as an out and back.