This is Euphydryas editha augustina from the Bluff Lake meadow area near Big Bear, June 17th, 2012.
These Euphydryas editha augustina can be locally common around Big Bear. These were along the PCT east of Van Dusen Road, Big Bear, May 6, 2006.
Another 'August' Edith's Checkerspot from the same hike.
Ventral of Euphydryas editha augustina, same hike. The endangered Quino Checkerspot is a different subspecies of editha, thus a close relative.