Monadnock Speedway is a paved one-quarter-mile (0.40 km) oval race track in Winchester, New Hampshire. Located south of Keene, the track is nestled between New Hampshire Route 10 and the Ashuelot River.

Winchester is a town in Cheshire County, New Hampshire, United States. The population was 4,150 at the 2020 census. The primary community in the town, where 1,606 people resided at the 2020 census, is defined by the U.S. Census Bureau as the Winchester census-designated place (CDP). The town also includes the village of Ashuelot and part of Pisgah State Park.