Standard Berkeley rock type, some crystals reminiscent of Cragmont rock park. 2 medium sized boulders, both are significantly smaller that mortar rock. One was recently cleaned of brush presumably by the city of berkeley. Not many people ever show up here to climb.
Go down or up Marin street to the Marin Circle, take the Arlington to Yosemite street, turn left, go a block down, and it is on the left. You can also go up Yosemite from the west.