Apart from the usual assortment of fun rocks to play upon, i spotted 5 patches of orange poppies on the south-facing slopes between the Henge and the train tracks.
The hike features Moderately difficult 200 feet of elevation gain and loss, and optional scrambling. Mild poison oak risk but it's avoidable
3 miles or so.
Several slots and cracks to climb through or up. Views of all the silly city dwellers in the distance