Apparatus, systems and methods for dovetail locking mechanisms are described herein. A system for locking the dovetail of a trailer in the travel position includes a sled for locking the dovetail of a trailer in the travel position, a railing on the underside of the trailer to accommodate the sled, wherein the sled is moveably attached to the railing such that the sled can slide into a loading position clear of the dovetail or a travel position at least partially beneath the dovetail, and means for actuating the sled to the loading position and travel position. A method for locking the dovetail of a trailer includes moving the dovetail of a trailer into the travel position and sliding a sled from a loading position underneath the trailer to a travel position at least partially underneath the dovetail of the trailer.