Land that, together with its plant and animal communities, is in a state that has not been substantially modified by and is remote from the influences of European settlement or is capable of being restored to such a state, and is of sufficient size to make its maintenance in such a state feasible. A wilderness area is a large, substantially unmodified natural area (or capable of being restored to such a state). Such areas are managed to protect or enhance this relatively natural state, and also to provide opportunities for self-reliant recreation in a relatively unmodified natural environment.