quot;Rock Tunnel was bored through 360 feet of solid rock. The Toltec Gorge drops off 600 feet below to the Rio de Los Pinos south of the track on both sides of the tunnel. Just west of the tunnel is a monument dedicated to the memory of President James A. Garfield after his assassination in 1881.quot; This info came from a href="http://www.esri.com"; target="_blank"www.esri.com/a, a great map resource.