Merger Update

Merger Update Information

***NEW*** 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 - July 2014

Frequently Asked Questions regarding our merger - April 2014

A letter to our customers regarding our merger with First Interstate Bank - February 2014

The Summit Club

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

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Tiered Savings

Tiered SavingsMore Details