RedactedNarrative: V 1 and V 2 were traveling north on the colorado river on the arizona side. V 2 was zig zagging back and forth in front of V 1. V 2 went to the right and V 1 was attempting to overtake V 2. V 1 made the mistake of going to the right as well. V 1 struck V 2 on the right side. V 1 and V 2 operators and passengers were ejected off both vessels.  V 2 had damage from V 1 on the rear seat and handle bars and controls. V 2 operator was struck on the right side and had a large red mark. V 2 passenger was tossed off, but did not have any visible injuries. V 1 operator did not have any injuries. Both vessels had damage. No one was transported to the hospital.