Sundown Marathon

The Sundown Marathon, previously known as Adidas Sundown Marathon, is an annual Sports Tourism event that started in 2008. The race takes place in Singapore.

The marathon is organized by the same team that made the Aviva Ironman 70.3 Singapore Triathlon possible. The event is unique in that it is Asia's only mass night running event. It attracts a diverse group of athletes and managed to attract 10,670 entrants in 2009.

There are different races and they are namely the ultramarathon (84.39 km), the marathon (42.195 km), the Women (10 km) and the Team/Corporate Challenge (10 km x 4 runners). The races all fall on the same night with different start times.

In 2011, 84 km ultramarathon was replaced with 100 km ultramarathon.

Runners are required to pay a fee to participate in the race. The price varies according to registration date, race selected, and the runners' history of participation in the event.