The location of the fire was roughly where the star is on this Google map. It looked as if the fire started six or seven hours before we got there. We ended up pouring our water bottles (and peeing) on some of the cinders, but a lot of the trees were still on fire at the tips of them. The ground was mostly ash and cinder also, but it looked as if someone had chopped down a tree post-fire.
No clue what started the fire, but it could have been lightning or a smoking hunter, etc… Who knows…?
After calling 911 and giving the most vague description of where we were ever, we ended up riding out to the end of the gas well road to find out where we were. Called 911 again, gave a better location, then went on riding!