The Spokane, Portland & Seattle Railway (SP&S; reporting mark SPS) was a railroad in the northwest United States.

Construction began in 1906[2] under the name Portland & Seattle Railway,[2][3] proceeding to the east and south from Vancouver, Washington.

[5] Despite legal challenges from Harriman, within a year the line had been built as far as Pasco along the Columbia River, where it connected with NP.

The first section to open was from Pasco west to Cliffs (near Maryhill), a length of 112 miles (180 km), on December 15, 1907.

[7][8] A "golden spike" ceremony was held on March 11, 1908 at Sheridan's Point to commemorate the completion of the railroad along the Columbia.

In 1910 the SP&S gained control of the Oregon Electric interurban railway, which James J. Hill and the Great Northern had acquired two years before.

Under the control of the SP&S (Ninth, Tenth, & Eleventh Subdivision) , the railroad was extended southward to Eugene by 1912.

[11] SP&S also operated a second subsidiary railroad, which James J. Hill purchased in 1907 for 5 million dollars, in northwestern Oregon.

In the end, the railroad opened using mostly the track of the Oregon Trunk, with a short portion of the Oregon & Washington Railway & Navigation Company track, and both railroads used the route (an arrangement that still exists with BNSF owning the majority of the line and UP having trackage rights).

The finished United Railways line went north from Wilkesboro through Banks, Manning, Buxton and Vernonia, Oregon.

New industries served by the SP&S included aluminum plants, sawmills, chemical factories and grain elevators.

[18] In 1954, a SP&S train derailed after hitting a rockslide on the route to Bend, Oregon, killing all crew members.

[20] The SP&S's passenger operations mostly involved hosting connections with parents' trains, such as the Empire Builder and North Coast Limited, which were combined to form the Streamliner (No.

The Inland Empire Express (daytime) and North Bank Limited (overnight) provided daily, through service between Portland and Spokane.

The car will be used as "premier seating", and during dinner trains can host a private party of up to eight in its lounge and dining room.

Two surviving SP&S Sleeper/Lounge cars are housed at museums, located at both ends of the reach of the railroad.

600 is owned by the Pacific Northwest Chapter of the National Railway Historical Society [26] and is housed at the Oregon Rail Heritage Center in Portland.

Wood coaches 213 and 218 (Barney & Smith 1912) were restored to running order between 2007 and 2019 on the museum's interpretive railway.