High Quality Content by WIKIPEDIA articles! State Route 8 (SR 8) is a state highway in Grays Harbor and Thurston counties, of the U.S. state of Washington. It extends 20.67 miles (33.27 km) from U.S. Route 12 (US 12) in the city of Elma, east to an interchange with US 101 about 5.90 miles (9.50 km) northwest of the state capital, Olympia. SR 8 intersects SR 108 west of McCleary. The route serves as a connector between Elma and Olympia.