The Newton Blackmour State Trail is a crushed limestone trail in northern Outagamie County in Wisconsin, United States. The trail spans 24 miles (39 km) on a former rail corridor. Its name is derived from the four communities the trail passes through: New London, Shiocton, Black Creek and Seymour. The trail's eastern end in Seymour connects to the Duck Creek Trail, which travels east through the Oneida Nation of Wisconsin and ends in the Village of Oneida.