U.S. Route 101 in Washington

U.S. Route 101
Map of western Washington with US 101 highlighted in red
Route information
Maintained by WSDOT
Length	365.55 mi[1] (588.30 km)
Existed	1926–present
Tourist routes	Lewis and Clark Trail Pacific Coast Scenic Byway
Major junctions
South end	US 101 at Oregon state line
Major intersections	SR 4 near Ilwaco SR 6 in Raymond US 12 in Aberdeen SR 20 in Discovery Bay SR 104 near Discovery Bay SR 3 in Shelton SR 8 near Olympia
North end	I-5 in Tumwater
Location
Country	United States
State	Washington
Counties	Pacific, Grays Harbor, Jefferson, Clallam, Mason, Thurston
Highway system
United States Numbered Highway System List Special Divided State highways in Washington Interstate US State Scenic Pre-1964 1964 renumbering Former
← SR 100 → SR 102

U.S. Route 101 (US 101) is a United States Numbered Highway that runs along the West Coast from Los Angeles, California to Tumwater, Washington. Within the state of Washington, US 101 connects cities on the coast of the Pacific Ocean and encircles the Olympic Peninsula around the Olympic Mountains. It also serves as the main access for Olympic National Park, several state parks, and other scenic and recreational areas.

The highway enters from Oregon on the Astoria–Megler Bridge over the mouth of the Columbia River near Astoria, Oregon. From there, it runs for 366 miles (589 km) north through Ilwaco, Raymond, Aberdeen, Hoquiam, and Forks before turning east towards Port Angeles. US 101 turns south near Discovery Bay and continues along the Hood Canal through Shelton towards Olympia, where it becomes a freeway and terminates at Interstate 5 (I-5) in Tumwater.