Steam ! ! ! I made a trip to the Cumbres & Toltec Scenic Railroad, which runs between Chama, NM, and Antonito, CO in September. My wife and I, along with Bob and Roberta Ward and Gary Hammon, rode from Antonito to Chama, 64 miles through the high mountains of Colorado and New Mexico. From Cumbres Pass to Chama, it is 14 miles downhill at 4% grade. Set the brakes!