RedactedNarrative: V1 WAS MOVING IN A SW DIRECTION ON CANTON LAKE TRAVELING TOO FAST FOR NIGHTTIME CONDITIONS WHEN V1 RAN AGROUND AND STRUCK A TREE.  AREA OF REST WAS THE SAME AS AREA OF IMPACT. AREA OF THE INCIDENT WAS APPROXIMATELY 2082 FEET NORTH OF CANADIAN BOAT RAMP AND APPROXIMATELY 4911 FEET SOUTH OF BIG BEN BOAT RAMP AND APPROXIMATELY 1694 FEET EAST OF CANTON BOAT RAMP.  OPERATOR AND PASSENGERS WERE ALL SLAMMED FORWARD DUE TO THE SUDDEN STOP OF THE VESSEL WITH EACH IMPACTING A PORTION OF THE INTERIOR VESSEL STRUCTURE.  ALL VICTIMS HAD BEEN TRANSPORTED FOR TREATMENT PRIOR TO THE INVESTIGATING OFFICER'S ARRIVAL.