First Interstate Bank Eureka Main Branch ← View details 508 Hwy 93 N, Eureka, MT 59917 +1 406-297-3116 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 — 04:00 pm Your comments * — Required information