Mont. Code Ann. § 25-33-303

There is no appeal from a judgment by default rendered in a justice's or city court except on questions of law which appear on the face of the papers or proceedings and except in cases when the justice's or city court has abused its discretion in setting aside or refusing to set aside a default or judgment. If the judgment by default is set aside, the district court must allow pleadings to be filed and try the case.