A snow plow for attachment to a vehicle, the snow plow including a mounting apparatus having a mounting frame, the mounting frame including at least one mounting upright. The snow plow further including a plow blade including a retention apparatus constructed and arranged to slidlingly and disengageably secure the plow blade to the mounting upright(s) when the plow blade is in a working orientation. The plow blade includes a mold board, preferably, a two piece mold board being an aluminum extrusion. The preferred snow plow also includes an attachable biasing member secured between the plow blade and the mounting apparatus such that the biasing member resists upward movement of the plow blade when the plow blade is in a working orientation.