First Interstate Bank Colstrip Main Branch ← View details 6210 Main Street, Colstrip, MT 59323 +1 406-748-2840 firstinterstatebank.com Suggest an Edit Name* State* Locality* ZIP* Street address* Phone* Website Opening hours Monday: 09:00 am — 04:00 pm Tuesday: 09:00 am — 04:00 pm Wednesday: 09:00 am — 04:00 pm Thursday: 09:00 am — 04:00 pm Friday: 09:00 am — 05:00 pm Your comments * — Required information