Yellowstone Bank Address: 554 E Pike Ave, Columbus, MT 59019 Phone: (406) 322-5366 Banks, Mortgages Other Businesses: Avanta Federal Credit Union at 912 E Pike Ave, Columbus, MT 59019 United Bank at 36 N 9th St, Columbus, MT 59019 United Bank of Columbus at 341 N 9th St, Columbus, MT 59019 R & H Concrete at 210 Annin Ave, Columbus, MT 59019