Closest boulders to parking: a disparate jumble of erratics with problems of varying quality.
2 mins from car. Hike along Rubicon Trail until you see a wooden fence on left, with a large boulder next to it. This is the Beer Run boulder. Alternately, walk from car parallel to Gerle Creek, keeping high on slabs: hike downhill, the first large rock you see (12 ft) will be the Kung Fu Hump boulder.