The HPMIA, situated on 10.4 acres of the old Osborn town site, includes 18 homestead buildings from the early 1900s era.  The site also has southern Montana’s largest collection of horse drawn machinery, early sugar beet equipment, corn, grain, and hay mowers.

The over 7,000 sq. ft. Museum Center is surrounded by 2 school houses, a doctor’s office, bank, homestead houses, woodshop, granaries, barn, and a railroad “Round House” from the early 1890s.