A boat dolly for supporting the stern of a boat. The bow of the boat rests on a pair of longitudinally disposed and transversely spaced-apart ropes that are tied to the frame of the boat dolly. The bow of the boat is supported and both the boat and boat dolly are propelled by applying manual force to the ropes. The boat dolly includes transversely adjustable wheels, transversely adjustable transom clamps, vertically adjustable transom clamps, self-adjusting hull-receiving rails, and provisions for folding to achieve compact storage.