Karen Johnson, 63, dead after ATV rollover on Hell's Revenge Trail near Moab, UT

63-year-old Karen Johnson was driving an ATV on the popular Hell's Revenge Trail in the area of Moab, UT, as part of a private group. As Johnson attempted a challenging climb up an obstacle known as a "hot tub", the vehicle lost traction and rolled downward. After being airlifted to a nearby hospital, Johnson, who was not wearing a helmet, was pronounced dead.