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 Jun 21 Sat 20th Annual Bitterroot Gem and Mineral Show Jun 21 - Jun 22 Hamilton Ravalli County Fairgrounds Events