Abstract: A snow plow side wing assembly is provided which is hydraulically operated and simply constructed such that it can be easily scaled down for mounting on a lightweight pickup truck. The assembly includes a wing blade, a lightweight frame adapted to be mounted to a vehicle, a pair of upstanding posts mounted fore and aft of the frame with each post including track means and a travel carriage mounted for sliding movement in the track means, and a hydraulic piston and cylinder arrangement mounted on the opposite side of the post to the track means with the cylinder mounted to the base of the post and the cylinder extending upwardly from the cylinder parallel to the post and connected to an extension arm extending parallel to the post and connected to the carriage. Two supporting arms extend from the carriage, both supporting arms being pivotally articulated to the carriage and to separate points on the end of the blade.