81-4-218. Marking land and mining claims in national forest. It shall be the duty of the owner or the person holding possessory right to all unfenced lands or patented or unpatented mining claims, which said lands or patented or unpatented mining claims lie within the boundary of national forest reserves in the state of Montana or which lie on public ranges adjoining to any national forest reserve, to mark the boundaries thereof by substantial monuments that can be readily seen and observed so that such boundaries can be readily traced.