Washington State Route 99 is a highway in the state of Washington, U.S.A. It extends just over 50 miles from Fife in the south to Everett in the east.

Originating at Interstate 5 in Fife at 54th Avenue E., from there it follows the route of old United States Route 99 up Pacific Highway through Federal Way and Des Moines, and into SeaTac, where, as International Boulevard, it skirts the eastern edge of Seattle-Tacoma International Airport. The road loses its state highway designation at the intersection of Washington State Route 518 and regains it in Tukwila at the junction of Washington State Route 599. From there, it continues first as West, then as East Marginal Way into Seattle, the changeover happening after it crosses the Duwamish River on the First Avenue South Bridge. It is then routed onto the Alaskan Way Viaduct south of downtown Seattle, which overlooks Elliott Bay. Tunneling under Belltown (the Battery Street Tunnel), it emerges as Aurora Avenue N. Aurora runs along the eastern slope of Queen Anne Hill, crosses the Lake Washington Ship Canal on the George Washington Memorial Bridge (1932), and continues beyond the city limits through Shoreline, Lynnwood, and into Everett, where it ends at Interstate 5 north of Everett Mall at the south end of Broadway.

External links

• Highways of Washington State (http://www.angelfire.com/wa2/hwysofwastate/sr099.html)