Updated!

Press Release - Anticipated Branch Closures in Conjunction with Expected Merger - 7/17/14


Press Release - Federal Reserve Approves First Interstate BancSystem, Inc.'s Acquisition of Helena-based Mountain West Financial Corp. - 7/7/14


Previous merger related documents can be accessed on our Merger Update page. This link is located on the homepage menu.

The Summit Club

Enjoy life to the fullest with our travel and social club for ages 50+.

More Details

Online Banking

Online BankingMore Details