Abstract: A ladder stabilization apparatus attaches to a ladder to provide safety and stability for the ladder's user when the ladder is supported by a tree, a post, a pole, or other non-flat surface. The stabilization apparatus attaches rigidly to the ladder and uses a concavely shaped device with a knife edge, multiple teeth, or rubber gasket to grip the tree, post, or pole, thereby securing the top of the ladder to the non-flat surface. When not in use, the concavely shaped gripper plate can be removed and attached to the ladder in a flat storage position, allowing the ladder to be used against typical flat surfaces.