520 bridge trail opens

Shared use path connects to local and regional trail system

The 520 bridge project hit another important milestone this week with the opening of the new bike and pedestrian trail on the bridge.

The 2.7-mile trail runs along the north side of the bridge with 11 scenic viewpoints. The path is 14 feet wide to accommodate a mix of bicyclists, joggers, and walkers.

In future phases, WSDOT will extend the walking and biking path to I-5 via a new Portage Bay Bridge and construct a landscaped, 30-foot-wide bicycle and pedestrian crossing over I-5.  A bicycle-pedestrian “land bridge” over SR 520 will connect the Arboretum to the north.

The Connecting Washington transportation package adopted by the Legislature in 2015 provides full funding for the west approach to the new bridge.

The 520 bridge has been in the works for decades. PSRC began funding the project with the original Trans-Lake Study in 1997.