In northernmost Oakland is the small, steep Panoramic neighborhood, which perches on the high ridge between Strawberry and Claremont canyons. At the top of Panoramic Way is this view north across Strawberry Canyon to Grizzly Peak, which at 536 meters (1758 ft) is the highest point in Oakland. Click the photo for a 1000-pixel version.
The bottom of the photo grazes the UC Botanical Gardens. The lowest slopes in this view are underlain by the Claremont chert, up to the powerline tower directly below the peak. Above that is the Orinda Formation, and the ridgeline is lava of the Moraga Formation.
To the right of the peak, on this side of Grizzly Peak Boulevard, is a big, towering outcrop of basaltic lava; here’s a closeup.
That seems like it would be worth a visit, if the poison oak isn’t too bad.