F7s in Glenwood Canyon By Angela Cotey | February 20, 2025 Email Newsletter Get the newest photos, videos, stories, and more from Trains.com brands. Sign-up for email today! Get Updates Five Denver & Rio Grande Western F7 diesels roll a westbound freight through scenic Glenwood Canyon between Dotsero and Glenwood Springs, Colo., in April 1965. Classic Trains coll.