40°01′20.0″N 105°27′47.3″W / 40.022222°N 105.463139°W The Switzerland Trail is the site of a historic 3 ft (914 mm) narrow gauge railroad line that was operated at different times by the Greeley, Salt Lake and Pacific Railway, the Colorado and Northwestern Railroad, and the Denver, Boulder, and Western Railroad around the turn of the 20th century in the Colorado front range mining area near Nederland, Gold Hill, and Ward. The west end of the trail is listed on the National Register of Historic Places as the "Denver, Boulder and Western Railway Historic District".