Duathlons are basically races for runner-cyclists who are put off by the idea of triathlons. That’s not to say that duathlons are easy; in many ways, the format of run-bike-run is a lot tougher on the legs than a triathlon. The Triathlon Association of Singapore scored big last year by moving the City Duathlon back to the Marina and having the start/finish area right on Raffles Quay. Entry numbers were high and the crowds large, so expect the same this year. The race consists of a 10km run followed by a 40km bike ride, then a 5km run to finish. 

Marina Bay.