Montana Title 70. Property § 70-16-205. Monuments and fences--mutual obligation of adjoining owners

(1) Coterminous owners are mutually bound equally to maintain:

(2) Except as provided by prescription, custom, or agreement between coterminous owners, each coterminous owner shall maintain all fencing to the right of the midpoint of the common boundary line as viewed from the owner's land. If the land of one owner is entirely surrounded by the land of another, each owner shall maintain all fencing to the right, as viewed from the owner's land, of the northeastern corner of the surrounded land or, if there is more than one northeastern corner, then from the northernmost northeastern corner to a point midway around the surrounded land. If there is a substantial difference in terrain or topographical features of the land between the coterminous owners, responsibility for maintaining the fence must be determined by mutual agreement with consideration given to factors such as cost and time.