This is a picture of a southbound freight crossing the Riley Creek Trestle in 1979. It was common for the southbound freight trains to pass through Denali Park in the afternoon. Often they would meet the northbound passenger train at Carlo. If the freight was a bit later, the meet would occur at Denali with the freight sawing by (the siding was too short to clear the freight) the passenger train which would hold the main so the passengers and baggage could be offloaded while the freight passed on the outside siding track.
 

Photo courtesy of Jason Kuehn