The Iowa Department of Natural Resources is investigating a fall at Backbone State Park that left a girl injured. An eight-year-old Jessup girl was hiking with her family and friends on a trail around 1:30 Monday afternoon when she fell off a cliff nearly 60 feet. Family members immediately called 911 and the girl was taken to a local hospital then airlifted to the University of Iowa Hospital in Iowa City. The DNR said today that the extent of the girl's injuries is unknown.