Travel Colorado's narrow gauge circle through the 16mm films of Otto Perry and Irv August. Follow the D&RG original main line from Salida over Marshall Pass to Gunnison and Montrose, then south to Ridgeway and the RGS to Durango. From there, we ride RG's San Juan passenger train to Chama and Alamosa, and then travel up the seldom photographed Valley Line over Poncha Pass to Salida. 60 minutes.