The Heaphy Track is a popular tramping and mountain biking track in the north west of the South Island of New Zealand. It is located within the Kahurangi National Park and classified as one of New Zealand's ten Great Walks by the Department of Conservation. Named after Charles Heaphy, the track is 78.4 kilometres (48.7 mi) long and is usually walked in four or five days. The track is open for shared use with mountain bikers in the winter season from 1 May to 30 September each year. The southern end of the track is at Kōhaihai, north of Karamea on the northern West Coast, and the northern end is in the upper valley of the Aorere River, Golden Bay.