General and Quilt Auctions The annual Rocky Mountain Mennonite Relief Sale will held on October 17, 2026, at the Douglas County Fairgrounds at the James Sullivan Events Center, 500 Fairgrounds Dr., Castle Rock, CO, 80104. The Silent Auction begins 9am, the General Auction begins 9:30am, the Kids Auction begins 10am and the Quilt Auction (more than a hundred quilts) begins 1pm. There is plenty of food for purchase and other booths selling unique craft and gift items and Fair Trade finds. Free admission. All proceeds go toward the support of Mennonite Central Committee (MCC).