Jay Nixon Backcountry is an undeveloped state park primarily located in Reynolds County, Missouri, with a 100-acre segment in Iron County. The property lies adjacent to Taum Sauk Mountain State Park and borders Ketcherside Conservation Area. The property is not open to the public. The park is named for governor Jay Nixon under whom several new …Jay Nixon Backcountry is an undeveloped state park primarily located in Reynolds County, Missouri, with a 100-acre segment in Iron County. The property lies adjacent to Taum Sauk Mountain State Park and borders Ketcherside Conservation Area. The property is not open to the public. The park is named for governor Jay Nixon under whom several new Missouri state parks were added.