Chicago, Milwaukee, St. Paul and Pacific Railroad
The Chicago, Milwaukee, St. Paul and Pacific Railroad Company Historic District consists of the historic right-of-way of the Chicago, Milwaukee, St. Paul and Pacific Railroad (also known as The Milwaukee Road) in the Bitterroot Mountains from East Portal, Montana (near St. Regis), to the mouth of Loop Creek, Idaho (near Pearson), a distance of . The district was once part of the railroad's mainline from Chicago, Illinois to Tacoma, Washington.