The roadway first appeared as Canyon Creek Road in a 1911 map and was designated Secondary State Highway 8B (SSH 8B) in 1937.

SR 140, renamed Canyon Creek Road, turned southeast and encountered a series of sharp turns until terminating at SR 14 in Prindle.

[7] SR 140 began as Canyon Creek Road and first appeared on a map in 1911.

[9] The roadway traveled along the Washougal River and Canyon Creek between Primary State Highway 8 (PSH 8), co-signed as U.S. Route 830 (US 830), between Washougal and Prindle.

[12][13] In 1968, US 830 was deleted and SR 14 was realigned south onto a newer alignment.