Sammamish River Trail

The Sammamish River Trail just east of the Interstate 405 and State Route 522 interchange in Bothell will be closed to all foot and bicycle traffic intermittently from July 9 to late September.

King County will begin repairing two sections of bank erosion along the Sammamish River on July 9, requiring brief, rolling closures of the popular Sammamish River Trail until the project is completed in September.

Closures are expected to last no more than 30 minutes and will occur only between 9 a.m. to 3 p.m., Monday to Friday. There will be no detours during the brief closures.

The work is to repair two areas where the levee along the river is eroding, threatening the integrity of the Sammamish River Trail and the safety of its users. The erosion is occurring along the right (or north) bank of the river, east of the Interstate 405/SR 522 interchange in Bothell. One site is about 500 feet east of the interchange; the second site is 1,200 feet east.

King County is performing this work as service provider to the King County Flood Control District, which is funding the project. The work is expected to conclude by Sept. 27.

Crews will stabilize the bank by reshaping it and planting native woody vegetation along it. The project also entails the installation of woody material along the eastern-most site and realignment of the Sammamish River Trail at both sites.

Residents who would like to receive text updates about the Sammamish River Trail closure or other Sammamish River Trail project information can text “KINGSRT” to “468311.” For updates via email, visit the project webpage,, and sign up for email announcements.