The Comrades Marathon is an ultramarathon of approximately 89 km (approx. 56 miles) which is run annually in the Kwazulu-Natal Provinceof South Africa between the cities of Durban and Pietermaritzburg. It is the world’s largest and oldest ultramarathon race. The direction of the race alternates each year between the “up” run (87 km) starting from Durban and the “down” run (89 km) starting from Pietermaritzburg. Runners over the age of 20 qualify when they are able to complete an officially recognised marathon (42.2 km) in under five hours. During the event an athlete must also reach five cut-off points in specified times to complete the race.