State Route 109 is a state highway located in the state of Washington. It runs primarily in a north-south direction, connecting the cities of Kenmore and Lake Forest Park. The route serves as an important local thoroughfare, facilitating access to residential areas and commercial districts. The highway spans approximately 5 miles and features several intersections with major roads, enhancing connectivity within the region. State Route 109 is maintained by the Washington State Department of Transportation, ensuring safe travel for commuters and visitors alike.