Washington State Route 507
highway in Washington
State Route 507 (SR 507) is a Washington state highway in Lewis, Thurston and Pierce counties that extends 43.52 miles (70.04 km) from Interstate 5 (I-5) and U.S. Route 12 (US 12) in Centralia to SR 7 in Spanaway. The highway also intersects SR 510 in Yelm and SR 702 in McKenna. The first appearance of the roadway on a map was in 1916 and since, two highways, Secondary State Highway 5H (SSH 5H) and SSH 1N, were established on the current route of SR 507 in 1937 and 1943. They both became SR 507 during the 1964 highway renumbering.
Route description
State Route 507 (SR 507) begins at a diamond interchange with Interstate 5 (I-5), co-signed as U.S. Route 12 (US 12) in Centralia. Traveling east as Mellen, Alder and West Cherry Streets, the highway crosses railroad tracks owned by BNSF Railway and used by Amtrak's Cascades and Coast Starlight routes, both of which serve the Centralia Amtrak station. The roadway later intersects Pearl Street, the only couplet on SR 507, which parallels Tower Avenue through Downtown Centralia. The street then becomes Tower Avenue and turns north to pass the Centralia Amtrak station. SR 507 realigns west as Sixth Street to intersect and become Pearl Street, once again traveling northeast as Downing Road to leave Centralia. Still parallel to BNSF Railway tracks, the road leaves Lewis County, enters Thurston County, passes Bucoda and turns north to intersect an old segment of US 99 in Tenino.
The public source identifies “Washington State Route 507” as highway in Washington. This brief keeps that definition visible, then builds a research path around Washington, State and Route.
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Vocabulary and entity names are the principal evidence signals here, because they determine the precision of every later search. The source revision retrieved here is dated Apr 2, 2026. The linked authority identifier is Q836456. 1 of 1 selected statements include explicit references; 0 carry qualifiers and 0 use preferred rank. The first chronological checks are 1916, 1937, 1943 and 1964.
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This entry incorporates text from “Washington State Route 507” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.