Railroad Archives Online
- CollectionD0197 - Maple Valley Historical Society Collection
- Series010 - Other Railroads
- Subseries Level 1014 - Photographs
- Subseries Level 2001 - Railroads--Equipment and Supplies
- Subseries Level 3004 - Railroad Passenger Cars
- ItemP2015.06.25-060 - Amtrak passenger train at Cedar Mountain, Washington, in 1978.