Bigs Flats is located in Adams County, Central Wisconsin. Big Flats is known for it’s ATV routes, Snowmobile trails, thousands of acres of public land, Big Roche-a-Cri Creek , Dead Horse Creek, Dry Creek, and Carter Creek. Big Flats also has 3 of the 23 named Rock Formations in Adams County; Rabbit Rock, Keystone Rock and Minnie Rock. Lots of Public Land, ATV routes, Snowmobile Trails. May 5th 2005 Cottonville Fire, Wisconsin's worst fire in over 25 years.