A quick connection and release assembly for releasably mounting a bicycle rack on the bumper of a motor vehicle. The assembly includes a bumper plate structure adapted to be fixedly secured to the bumper by fasteners and defining at least one tongue extending upwardly from an upper edge thereof and a bicycle rack plate structure adapted to be fixedly secured to a rear face of the bike rack base plate by fasteners and including an aperture proximate an upper edge thereof sized to receive the tongue and retractable pins proximate lower side edges thereof for positioning behind a lower edge portion of the bumper plate structure.