Big Horn County Of - Hardin--museum Historical Hardin, MT 59034 Phone : (406) 665-1671 Business Category Government Offices-County Museums Government Offices & Public Schools Big Horn County Historical Msm Ih 90 Exit 497 Hardin, MT 59034 Phone : (406) 665-1671 Business Category Museums Hardin Visitor Infrmation Center Ih 90 Exit 497 Hardin, MT 59034 Phone : (406) 665-1671 Business Category Business Services Convention Information Services