On Friday afternoon, the 14th of September, Mark Uptain, a hunting guide, and Corey Chubon, a bow hunter, were attacked by grizzly bears as they processed an elk carcass. Chubon had mortally wounded the elk with an arrow, the day before, but they had not recovered it before nightfall. They came back the next day and followed a good blood trail to the dead elk.They had nearly finished processing it when they were attacked by the grizzly bears.