Jekyl & Hyde Duathlon

London League Event - maximum numbers needed

The entire race is held within Hyde Park and Kensington Gardens, the first run on a beautiful course taking in the footpath around the Serpentine (4.2km). The bike is 8 laps of South Carriage Drive (20.8km) – don't be fooled, it's not flat but it should be fast and the road surface is good. Not done yet though, you finish with two laps of the Serpentine (7.6km)

http://www.serpentine.org.uk/pages/duathlon.html