Bruce "Digger" Hargreaves (born 1953) is an Australian-based marathon runner who has completed 150 marathons and 45 ultra-marathons(races longer than the Olympic Marathon distance of 42.195 km) as at October 2018. Bruce was the Australian Ambassador for the Comrades Marathon from 2008 until 2015, and now is the second person along with Mr Mark Bloomfield from Washington DC to be granted the status of "Ambassador at Large" for the Comrades Marathon Association. The Comrades Marathon is held annually in South Africa, and as at 2016, Bruce has successfully finished 7 Comrades Marathons.