I-90 Trail and Sidewalk Detours

In order to safely construct the roundabout at North Mercer Way and 77th Ave SE, Sound Transit has implemented several trail detours that will be in place untll approximately the end of 2022.Various portions of the Mountains-to-Sound (aka I-90 Trail) and some neighboring sidewalks are closed to all users. Click here to view detour map. The green lines in the detour map are the suggested alternative routes; note that the dotted green route connects but does not have sidewalks. Detour routes are signed at key intersections and locations.

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