Mont. Code Ann. § 87-2-121

In recognition of the inalienable right of persons to acquire and possess property in all lawful ways contained in Article II, section 3, of the Montana constitution and of the heritage of individual citizens to harvest wild game animals contained in Article IX, section 7, of the Montana constitution, a landowner and a landowner's guests and lessees may hunt on the landowner's private property as long as the hunting is conducted in the manner provided by law and is consistent with regulations.