Route information | ||||
---|---|---|---|---|
Length | 35.17 mi[1] (56.60 km) | |||
Existed | 1964[2]–present | |||
Major junctions | ||||
South end | I-705 in Tacoma | |||
SR 99 in Federal Way SR 516 in Des Moines SR 518 in Burien | ||||
North end | SR 99 in Seattle | |||
Location | ||||
Country | United States | |||
State | Washington | |||
Counties | Pierce, King | |||
Highway system | ||||
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State Route 509 (SR 509) is a 35.17-mile-long (56.60 km) state highway in the U.S. state of Washington. The highway goes from Interstate 705 in Tacoma in Pierce County to SR 99 in Seattle in King County.