Ravalli County Fairgrounds Hamilton, MT Email Address: Ravalli County Fairgrounds 100 Old Corvallis Rd. Hamilton, MT Info: Website 406-363-3411 Region: Bitterroot Upcoming events at Ravalli County Fairgrounds May 24 Sun Gull Boats and RV: Full Throttle Super Sale May 24 - Jun 14 Hamilton Ravalli County Fairgrounds Events Sports & Recreation