Abstract: A hydraulic log splitter attachment for a skid steer loader includes a mounting framework attached to a vertical elongate beam. A piston/cylinder combination with a rod for movement between retracted and downwardly extended configurations mounts to the beam. A wedge attaches to a lower end of the rod. A base plate attaches to the beam adjacent the lower end; storage wall assemblies and stabilizing plates optionally attach to the base plate. Hoses connect the piston/cylinder combination to the loader's hydraulic system. Wedge guides slidably attach the wedge to the beam. The wedge guides optionally include wedge guide rollers; the wedge optionally includes wedge rollers. The loader secures to the mounting framework. Wood is placed on the base plate while the rod is in the retracted configuration. The rod moves to the downwardly extended configuration, thus splitting the wood with the wedge. The storage wall assemblies provide split wood storage.