I had brought a handheld FM radio (a Yaesu VX-6R), however, and was at least able to log 9 contacts on the 2-meter band (146.520 MHz FM) and qualify for an activation of the summit.
Looking south, with San Francisco in the distance.
The Pacific Ocean, over which I had hoped to talk to VK1AD.
The summit of the east peak of Mt. Tamalpais, as seen from below.