Washington State Route 122

State Route 122
SR 122 is highlighted in red.
Route information
Auxiliary route of US 12
Maintained by WSDOT
Length7.88 mi (12.68 km)
Existed1991–present
Major junctions
West end US 12 in Silver Creek
East end US 12 in Mossyrock
Location
CountryUnited States
StateWashington
CountiesLewis
Highway system
SR 121 SR 123

State Route 122 (SR 122) is a 7.88-mile-long (12.68 km) state highway on the north shore of Lake Mayfield in rural Lewis County, located within the U.S. state of Washington. The highway begins at U.S. Route 12 (US 12) in Silver Creek and travels east through Ike Kinswa State Park before turning south over the Cowlitz River to Mossyrock, ending at US 12. SR 122 was established in 1991 on roads built in the 1910s and 1940s and the designation was transferred from SR 142.