Montana Title 25. Civil Procedure § 25-2-123. Real property

(1) The proper place of trial for the following actions is the county in which the subject of the action or some part thereof is situated:

(2) Where the real property is situated partly in one county and partly in another, the plaintiff may select either of the counties and the county so selected is the proper county for the trial of such action.

(3) The proper place of trial for all actions for the recovery of the possession of, quieting the title to, or the enforcement of liens upon real property is the county in which the real property, or any part thereof, affected by such action or actions is situated.