Coast to Kosciuszko (C2K) is a 240 kilometres (150 mi) ultramarathon race run each December in New South Wales, Australia. The race commences at Twofold Bay (at sea level) and concludes at Charlotte Pass (1,837 metres (6,027 ft) above sea level) after reaching the summit of Mount Kosciuszko (Australia's highest point at 2,228 metres (7,310 ft) above sea level).