Abstract: A spring-loaded bumper clamp for vehicular trailers attachable to a rail of an extant trailer, said spring-loaded bumper clamp including a pair of hook clamps disposed on either end of a pivot bar, said pivot bar rotatably disposed between each of a pair of vertical strut members vertically oriented atop each of a pair of horizontal strut members, which horizontal strut members are attached to a plate member connectable to the rail of an extant trailer, wherein rotation of the pivot bar by action of a handle member tensions a pair of spring members and moves each of the pair of hook clamps from a first position to a second position to releasably secure around an extant bumper of an all terrain vehicle, whereby an all terrain vehicle is expediently securable and releasable atop a trailer to which the spring-loaded bumper clamp is attached.