Abstract: A cargo bed system includes a rail for mounting to a vehicle having a cargo bed. The rail includes a lower extension having a first side and a second side, opposite the first side, extending along a length; an upper extension extending generally perpendicularly from the length of the lower extension, supportable by the vehicle; a clamp track located on the first side of the lower extension and extending along the length of the lower extension for receiving one or more clamps to secure the rail to the vehicle; and a lower accessory track located on the second side of the lower extension and extending along the length of the lower extension for receiving an accessory within the cargo bed.