California Historical Landmarks in Kern County
California Historical Landmark 508
Old Highway, 3.2 Miles East of Keene Exit, 6.5 Miles West of Tehachapi
From this spot may be seen a portion of the world-renowned Loop completed in 1876 under the direction of William Hood, Southern Pacific railroad engineer. In gaining elevation around the central hill of the Loop, a 4,000-foot train will cross 77 feet above its rear cars in the tunnel below.
Citation from California Office of Historic Preservation