Hayward Regional Shoreline consists of 1,811 acres of salt, fresh, and brackish water marshes, seasonal wetlands and public trails.

Cogswell Marsh, a 250-acre tidal marsh restoration and enhancement project, was completed in 1980. This area, once restored to tidal action, rapidly became an established saltwater marsh.

Birds: shorebirds, waterfowl, swallows.

Hiking Difficulty: 2

Directions (four options):

Option 1, via 680 South: Take 680 south Take 580 west Take 238 west Take 880 south Take 92 towards San Mateo Bridge Exit at Clawiter, go left, then make a quick right on Breakwater Follow Breakwater (it's a frontage road along 92) west until you reach the Hayward Shoreline Interpretive Center Option 2, via 680 South: Take 680 south Take Crow Canyon Exit Take Crow Canyon west to Castro Valley Blvd Take 238 west Take 800 south Take 92 towards San Mateo Bridge Exit at Clawiter, go left, then make a quick right on Breakwater Follow Breakwater (it's a frontage road along 92) west until you reach the Hayward Shoreline Interpretive Center

Option 3, via 24 West: Take hwy 24 west Take 980, which goes directly onto 880 south Take hwy 92 towards San Mateo Bridge Exit at Clawiter, go left, then make a quick right on Breakwater Follow Breakwater (it's a frontage road along 92) west until you reach the Hayward Shoreline Interpretive Center Option 4, via 24 West: Take hwy 24 west Take hwy 13 south to 580 south Take hwy 238 west to 880 south Take 92 west towards San Mateo Bridge Exit at Clawiter, go left, then make a quick right on Breakwater Follow Breakwater (it's a frontage road along 92) west until you reach the Hayward Shoreline Interpretive Center