(Idaho)
The Ashton to Tetonia Trail is a 29.6-mile (47.6 km) rail-trail conversion built on the former Teton Valley Branch of the Union Pacific Railroad from Ashton to Tetonia, Idaho. The trail is used for hiking, biking, horseback riding, cross-country skiing, snowshoeing, and snowmobiling. Access points are found at Ashton, Marysville, Bitch Creek, Felt, and Tetonia. It is managed through Harriman State Park under administration by the Idaho Department of Parks and Recreation. (Ref: https://en.wikipedia.org/wiki/Ashton_to_Tetonia_Trail)