Abstract: The retractable mud flap system comprises two tracks, a chute, and a flap carrier. The invention is used to retract and extend a mud flap on a truck and is commonly used in pairs of two so that a mud flap on each side of the truck may be retracted. The retractable mud flap system attaches to the underside of a truck's dump bed or to extensions of the truck frame above the rear wheel. The flap carrier comprises two roller assemblies and a flap clip. A mud flap is coupled to the flap clip and passes through the chute. The roller assemblies move on the tracks with the flap clip mounted between them. A control located within the cab activates a motor on one roller assembly, moving the roller assemblies and the mud flap. A remote control embodiment is also described.