Osterman's Mini Warehouses self storage started in 1980. Veteran-owned and operated. 44 years in business. Osterman's has 2 locations + Bozeman at 1800 N. Rouse and Belgrade at 234 Arden Dr. We have 2,500 storage units Storage from Household, boats, RVs and vehicles. Offering great yearly rates. Onsite managers with sizes from 5x6 up to 30x40. We take pride in our clean, well-managed storage facility in Bozeman & Belgrade and we keep it protected by a perimeter fence, and gated access so you can rest easy while storing with us. Our Belgrade location offers Airport Shuttle service and when you are done we can bring your vehicle back and store it for the next trip.