Black Hills Central Railroad 108 nears Keystone as it coasts downhill in Echo Canyon.

Black Hills Central Railroad 108 drifts down the grade as it goes through one of the canyons along the route from Hill City to Keystone.

Black Hills Central Railroad 108 coasts down hill into Battle Creek. The rest of the journey to Keystone is downhill from here.

Black Hills Central Railroad 108 works hard up Tin Mill Hill as it passes through a rock cut with steep cliffs to either side of the train.

Black Hills Central Railroad 108 nears Twin Springs Road as it charges up the 4% grade at Oblivion.

Black Hills Central Railroad 108 nears the end of the 1 mile long, 4-6% grades of Tin Mill Hill as it approaches Old Hill City Road.

Black Hills Central Railroad 108 begins the grueling 6% grade of Tin Mill Hill.

Black Hills Central Railroad 108 works hard up the 4% grade at Oblivion.