Abstract: A receiver hitch system for all-terrain sport vehicles includes a rigid mast assembly attaching to a two-point receiver hitch at the rear of the vehicle. A lower receiver hitch is attached to a non-suspended axle of the ATV, and an upper receiver hitch attaches to a suspended frame of the ATV, so that the rear suspension cannot operate, and loads on the mast assembly are borne directly by the axles and wheels. Lifting masts with booms, hunting platforms, and cargo boxes may be supported by the mast assembly.