You are in the CarrTracks website Picture Gallery.
It helps to have a wide angle lens at Castle Gate. The canyon is narrow and steep. Train 148 (Extra 3126 East) is easing down the hill on December 2, 1975. Almost three years later, train 171 (Extra 5339 West) climbs the hill on June 4, 1978. Then two years later, train 136 comes through Castle Gate on August 20, 1980. Disk 33