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To reach Park Delta Bay by road:

From the San Francisco Bay Area, take Highway 4 to Antioch, North on Highway 160 across the Antioch Bridge, East on Highway 12 and right turn onto Jackson Slough Rd. Turn left onto W Brannan Island Rd.

From Sacramento, take I-5 to Hwy 12, W 12.8 mi on Hwy 12 to Jackson Slough Rd, S 1.6 mi to Brannan Island Rd, E 1.8 mi (L)

 

To reach Delta Bay Marina by boat:

Lat: 38.10749817, Long: -121.6039963

From the San Francisco Bay, pass through San Pablo Bay. Travel through Carquinez Straits to Suisun Bay. Travel up San Joaquin River to Andrus Island.