From the verso: "California Zephyr wrecked in Glenwood Canyon. March 1968." On March 29, 1968, a passenger train was passing through Glenwood Canyon near Grizzly Creek when it derailed. Two of the diesel locomotives, F9A 5774 and F9B 5773, were later retired and sold for scrap to Barter Machinery & Supply Company out of Denver in May of 1969. This photograph was possibly taken by Brent Pappas.