We had a great little hike this weekend with Poodles At Play up above Tilden Park, in Berkeley.  I need to explore around the Grizzly Peak Road area a little more for some hiking.
This area above Tilden boasts views from Antioch across Marin, Mt. Tam, the Golden Gate, and San Francisco (seen here).  It also looks out over Contra Costa on the other side of the ridge, with Mt Diablo, Las Trampas and unknown waves of ridges receding to the East.
This is a WWII gun battery set up for a straight shot at anything coming through the Golden Gate.