Abstract: An automatic trailer load covering system includes a pair of end assemblies removably secured to opposite ends of the trailer load bed, and a main strut extending between the midpoints of the upper sides of the end assemblies. Each end assembly includes an arch-like channel that supports an end wall, the channels of the end assemblies being oriented in paired, opposed, confronting relationship. At least one pair of tarp covers is provided, each rectangular tarp cover including longitudinally opposed side edges received in one pair of the end channels. Each tarp cover extends from the main strut to the trailer bed, covering one side and one-half width of the top of the trailer load bed. A drive sprocket is supported on the main strut at the upper extent of the channel and an idler sprocket at the lower end of the channel, with a continuous loop of chain extending through the channel.