SR 18 is a state route located in the U.S. state of Washington. It runs primarily through King County and connects the cities of North Bend and Snoqualmie. The route is known for its scenic views of the surrounding mountains and forests, making it a popular choice for both commuters and tourists. The highway spans approximately 20 miles and serves as a vital link for local residents and visitors heading to outdoor recreational areas, including Snoqualmie Pass. SR 18 also intersects with other major routes, facilitating access to nearby attractions and enhancing regional connectivity.