The Spokane, Portland and SeattleRailway (AAR reporting mark SPS) was a United States-based railroad incorporated in 1905.
It was a joint venture by the Great Northern Railway and the Northern Pacific Railway to build a railroad along the north bank of the Columbia River.
In 1970, it merged with the Great Northern Railway, the Northern Pacific Railway, and the Chicago, Burlington and Quincy Railroad to form the Burlington Northern Railroad.
Jim Hill's Spokane, Portland and SeattleRailway purchased the system in 1910, and extended service to Eugene in 1912.
Regular passenger service along the Willamette Valley ended in June 30, 1933, though freight operations continued and the railway survived into the 1990s (ultimately as a Burlington Northern feeder).
BN operated the last freight train on this mainline on December 31, 1994, in preparation for the line's changeover to TriMet light rail usage.