Washington State Route 397

State Route 397
A map of the Tri-Cities with SR 397 highlighted in red.
Route information
Auxiliary route of US 395
Maintained by WSDOT
Length	22.31 mi[1] (35.90 km)
Existed	1991–present
Major junctions
South end	I-82 / US 395 near Finley
North end	I-182 / US 12 / US 395 in Pasco
Location
Country	United States
State	Washington
Counties	Benton, Franklin
Highway system
State highways in Washington Interstate US State Scenic Pre-1964 1964 renumbering Former
← US 395 → SR 401

State Route 397 (SR 397) is a state highway in the U.S. state of Washington, serving the Tri-Cities region. It primarily functions as a truck route through industrial areas in Finley, Kennewick, and Pasco, running 22 miles (35 km) between junctions with Interstate 82 (I-82) and I-182. The highway crosses the Columbia River on the Cable Bridge, built in 1978 to replace an earlier bridge.

SR 397 was added to the state highway system in 1991, as a short route connecting Finley to Pasco. Two years later, the highway was extended further south into Finley. The remaining highway between I-82 and Finley in the Horse Heaven Hills was constructed by the state government and Benton County from 2004 to 2008 and was signed as part of SR 397 in 2009.