City of Palo Alto
“Palo Alto’s open space preserves offer a chance to hike from the marshes of the bay to the redwoods of the upper Santa Cruz mountains.”
Baylands Nature Preserve near Palo Alto – According to Wikipedia, this preserve is the “largest tract of undisturbed marshland remaining in the San Francisco Bay.” Here is Mark Hehir’s video of the accessible paths and many of the birds to be found there. Phone 650-329-2506 This is their website.
Palo Alto Open Space and Parks