Angel Island State Park is the largest naturally-created island in San Francisco Bay. It's 478 acres provide some of the best scenery in the Bay Area while also providing history buffs with several chances for outdoor enlightenment. These lands have played host to human populations for over 8000 years, with the earliest evidence pointing back to several prehistorical native tribes.
The area also acted as a resupply stop for several notable Spanish explorers before being formally mapped and built up. Between 1911 and 1941, this region also served as a primary processing hub for many waves of immigrants from countries like China and Korea. After this period, the island served as a missile base before officially becoming a state park in 1954.
The Angel Island Cafe and Museum are open to guests seasonally and offer a wonderful experience for patrons. Several artifacts from the history of the park exist here, spanning several thousands of years, as well as video displays and information booths. Guided tours of the park's still-operating archaeological sites are available on a first come, first serve basis.
Additional info on these guided tours can be found on the California State Park's website. Sorry dog lovers, but canines are prohibited from the museum facilities. Boating is available here, as Angel Island State Park was and continues to be an active part of the surrounding bay. Guests are welcome to rent a kayak or canoe and explore the area's several miles of coastline.
There are also ferryboat tours that regularly leave throughout the summer months. Dogs are allowed to accompany guests on watercraft provided they stay on a leash throughout their visit. If you're more of swimming aficionado, the island hosts two small public beaches. Both of these are regularly staffed with lifeguards during their hours of operation so that you can enjoy the water without concern. Dogs are allowed in these public areas, as long as they're on restraint and don't bother other guests.