A.S.O. UK is the country’s leading mass participation events company, putting on events each year in triathlon, cycling, and running. Part of Amaury Sport Organisation (A.S.O.), owners of Le Tour de France and the leader in the French running and sportive market, A.S.O. UK’s prestigious portfolio includes the Cancer Research UK London Winter Run, adidas Manchester Marathon, Royal Windsor Triathlon, and Dragon Ride. The company also specialises in delivering bespoke corporate events, working with businesses such as JLL and Impetus-PEF.

A.S.O. UK’s events bring together an active community of people taking part in sporting events for reasons ranging from fitness, competition, charity, health, fun or to simply finish. The participants vary from first timers of all ages through to World Champions. Collectively, the events raise millions of pounds for hundreds of charities.