Abstract: A support system for loading ramps useful in loading and unloading vehicles and other machinery in truck beds and similar storage and transport structures. The support system includes a horizontal support which couples with a hitch receiver, a vertical support having a central aperture at its top to receive a support bar of a loading ramp system, and an angle brace designed and configured to be removably affixed to the horizontal and vertical supports. The angle brace may extend at an angle of between 20 and 40 degrees or between 50 and 70 degrees from horizontal. In some embodiments the support system is provided with a ramp system including a pair of ladder ramps, each ladder ramp having two ladder ramp segments hingedly connected. In these and other embodiments the support system may be provided with a ramp system including an arced segment near the top portion thereof.