Running through 5 former railroad tunnels, this trail follows the bed of a railroad track used to haul supplies for the Hoover Dam project in the 1930s. The tracks were dismantled in 1962, and then converted into a hiking and biking path. Each of the tunnels is approximately 300 feet long and 25 feet wide, and the open trail provides views of Lake Mead. Don’t miss this adventure, listed on the National Register of Historic Places.