Thursdays through Sundays - 10:30 AM – 3:30 PM The 19th century gristmill is the centerpiece of McConnells Mill State Park. The historic gristmill at McConnells Mill State Park is open Labor Day, and every Thursday through Sunday to the end of October from 10:30 AM to 3:30 PM. Admission is free. Interpretive tours of the historic mill, given by staff or volunteer docents, are scheduled daily at 1:00 and 2:00 PM or by request. Park at the Kildoo Picnic Area and hike down the stone stairs to the mill. Limited parking, for people with disabilities, may be available beside the mill. Interpretive tours for groups may be scheduled by calling the Moraine Park office 724 368-8811.