I remember riding #5 into LA c. 1963. UP even then was a West Coast road. Also too, the City of Portland on the Oregon Short Line:
Breakfast in the Dome Diner! Looks like 13y old geysergazer was chomping on a slice of toast with a plate of pancakes in front of him. Doesn't get any better than that!
UP on the Plywood Empire Route:
In the photo Dad took c. 1962, a UP E8 and an E9, Green River, Wy.