Aphrodite Fritillary / Speyeria aphrodite

I find Fritillaries so hard to identify, and I never want to risk giving an incorrect ID. So, here is one of the Fritillary species, seen at the Bragg Creek Natural Area, which we botanized for the day on 3rd September. Possible Aphrodite Fritillary, Speyeria aphrodite, though it is late for this species. Map location very approximate.