Travel Colorado's Narrow Gauge Circle through the 16mm films of Otto Perry and Irv August from the archives of the Rocky Mountain Railroad Club. From Salida we follow the Denver & Rio Grande original mainline over Marshall Pass then west of Gunnison through the Black Canyon to Cimarron where the challenge of Cerro Summit greets us. Traveling south from Montrose on the Ouray Branch to Ridgeway we pick up the Rio Grande Southern's Silver San Juan passenger train to Chama over Cumbres Pass to Alamosa. The trip ends as we travel up the seldom photographed Valley Line over Poncha Pass to Salida.