Harbortown Pedway (no bikes allowed, you’ll be in Harbortown, a San Mateo neighborhood) follows the west side of Seal Slough, part of the Marina Lagoon, from Fashion Island Blvd (and Hwy 92) north to Shoal Drive. From Fashion Island Blvd you can also head south along the O’Neal Slough via the Foster City Levee Pedway (bikes allowed).
Harbortown Pedway is a pleasant walk behind the Harbortown condos. Along the way you will see The Fish Market and Parkside Aquatic Park across the marina.