London Duathlon, the world's biggest duathlon event to be held on Sunday 12th September 2010, has launched a new Ultra Duathlon distance that will appeal to the thousands of athletes now focussing on longer distance racing. The 20km : 80km : 10km event will be integrated into the existing Challenge and Fun distance events for the London Duathlon, held annually in Richmond Park - the only day in the year that the Park is closed to vehicles.

Mass Participation Events, organisers of the Goodwood Duathlon and Liverpool Triathlon, recently acquired the London Duathlon, though Kevin Stewart, Managing Director of MPE, was instrumental in establishing the original London Duathlon as a Director of London Triathlon Ltd. He said "I am delighted to be involved with the event again. Richmond Park provides a stunning venue and we feel that by launching an Ultra Duathlon, we can draw a new audience to the London Duathlon. This is one of several new initiatives we are looking at to build on the existing success and make 2010 the best event to date."

The Ultra distance will involve two laps of the Park for the first run, followed by seven laps on the bike and a further full lap of the Park to finish. Places in the event will be available on a first come, first served basis and limited by the route capacity. Athletes will start in the first waves of the day and be limited to 6hrs 15 mins to complete the distance.

Entries are open now: www.TheLondonDuathlon.co.uk