Railroad Archives Online
- CollectionD0063 - Walter W. Ainsworth Collection
- Series007 - Spokane, Portland, and Seattle Railway
- Subseries Level 1014 - Photographs
- Subseries Level 2004 - Railroad tracks
- Subseries Level 3001 - Railroad mainline
- 2 more...
- ItemWWASPSL2-034 - Spokane, Portland, and Seattle (SP&S) Railway Tracks, Cape Horn, Washington, undated
- ItemWWASPSL2-035 - Spokane, Portland, and Seattle (SP&S) Railway Tracks, Cape Horn, Washington, undated
- ItemWWASPSL2-050 - Spokane, Portland, and Seattle (SP&S) Track Under Constructions, Cascades, Washington, 1906
- ItemWWASPSL2-076 - Spokane, Portland, and Seattle (SP&S) Stevenson, Washington, Stevenson, Washington, 1907
- ItemWWASPSL2-081 - Spokane, Portland, and Seattle (SP&S) Last Spike Ceremony, near Stevenson, Washington, March 11, 1908
- ItemWWASPSL2-082 - Spokane, Portland, and Seattle (SP&S) Last Spike Ceremony, near Stevenson, Washington, March 11, 1908
- ItemWWASPSL4-025 - Spokane, Portland, and Seattle (SP&S) Mainline near White Salmon, Washington, undated
- ItemWWASPSL4-039 - Spokane, Portland, and Seattle (SP&S) Mainline near Bingen-White Salmon, Washington, 1951
- ItemWWASPSL4-040 - Spokane, Portland, and Seattle (SP&S) Mainline near Lyle, Washington, undated
- 26 more...