Starting at the yards in Roseville Calif., you\'ll follow Southern Pacific\'s trains up and over \"The Hill\". SP\"s 6 axle SD\'s tackle 138 miles of up to 2.4 percent grades. Up to 11 units are needed for the climb. The standard arrangement is a 4 by 6, with four engines leading, and six mid train helpers, and an end of train helper.
Enjoy!!