Especially interesting is the huge cecropia moth. This colorful member of the silkworm family feeds at night on the native ceanothus, or California lilac. Supporting the abundant wildlife is a mixture of chaparral, open grassland, and oak woodland. Coast live oak is the predominant tree, although Engelmann oaks occur throughout the park. The chaparral consists of scrub oak, California buckwheat, chamise, manzanita, ceanothus, and white and black sage.
Visitors often remark on the huge boulders that dot the hillsides.
These were formed when the granitic rock that makes up the mountains was brought to the surface by the movements of the earth's crust. Over eons, exposure to the wind and rain has worn the granite to its present configuration. Facilities Dos Picos County Park was designed for campers and picnickers. Each campsite and picnic bench is fitted into the 78-acre area as naturally as possible. Tent sites, RV sites with partial hookups, and a caravan area offer alternatives for overnight stays.