This is a Satyr Anglewing (Polygonia satyrus). I first wrote about them last May when we saw one during a walk at Point Reyes (read that story here), but these are the first pictures I've posted of this species from Bodega Head.
Satyr Anglewings are often associated with Stinging Nettles, and so far that holds true for the places I've seen this species on Bodega Head (Campbell Cove and Owl Canyon).
Note the dramatic angles along the edges of the wings:
Although a beautiful orange above, Satyr Anglewings are mostly brown below (see next photo). When their wings are held upright, their shape and subtle coloration probably helps them look like a dried leaf or a piece of bark.
It was interesting that the white hindwing mark on this individual was a slightly different shape — it was much more hook-like (next image). All of the characteristics still point to this being a Satyr Anglewing, but it's a good example of how individuals can vary within a species.
P.S. For the record, the other species of butterflies recorded at Campbell Cove today included Acmon Blue, Echo Blue, Cabbage White, Mylitta Crescent, and Red Admiral.