The Preserve also provides hiking opportunities in the several miles of trails in the uplands area. Take the trail out of the parking area to reach the Meadowlark Ridge Loop for good views of the marsh. Walk to the northern end of the park towards the pepperwood trees to see signs of the old housing site dating from the early 1900s.
From Sacramento: Take I-80 west to the Cordelia junction, then drive south on I-680 to Benicia. About two miles after crossing the Benicia-Martinez Bridge, take the Marina Vista/Waterfront Road exit from I-680. At the end of the off-ramp, turn right onto Waterfront Road, go under the freeway, and watch for the right turn into the Preserve.
http://www.tripleblaze.com/trail.php?c=3&i=7057