Crossing Lake Washington: The I-90 Bike Path

The I-90 floating bridge bike path is one of Seattle's most unique cycling experiences—a dedicated bike lane on a floating bridge that crosses Lake Washington, connecting Seattle to Mercer Island and the Eastside.

The Route

The I-90 bike path starts in Seattle's Mount Baker neighborhood, follows the I-90 corridor east, and crosses Lake Washington on a floating bridge with a dedicated bike and pedestrian path. The path continues through Mercer Island, with connections to the Eastside rail-trail network. It's a key link in the regional trail system, connecting the Burke-Gilman Trail to the Mountains to Sound Greenway.

Riding the Floating Bridge

Riding a bike on a floating bridge is a unique experience—you're literally riding on a path that floats on Lake Washington. The path is separated from traffic by a concrete barrier, making it safe and comfortable. The views are spectacular—Lake Washington on both sides, the Seattle skyline to the west, and the Cascade Mountains to the east.

Connecting to Other Trails

On the Seattle side, the I-90 path connects to the Mountains to Sound Greenway trail and the city's bike lane network. On Mercer Island, it connects to the Mercer Island trail system. On the Eastside, it links to the East Lake Sammamish Trail and the regional trail network. You can ride from Seattle to Issaquah almost entirely on trails using this route.

Tips for the Ride

The bridge path can be windy and exposed, especially in bad weather—dress accordingly. It's a popular route for commuters, so expect company during rush hours. The path is well-maintained and lit at night. Bring water, as there are no services on the bridge itself. The total distance from Seattle to Mercer Island is about 5 miles each way.