London
Triathlon Calendar London 2026-2027
Monthly updates for London
Get new running races (and updates) in your inbox every month.
Explore the best triathlons in London for 2026-2027! Our updated list features 6 exciting races across the region. Find your next race in London below and join the running community at these great events!
August 2026
A community duathlon on Hampstead Heath combining swims across the ponds and short runs, held on 30 August 2026. Individuals and teams of three to five can enter, and some proceeds support local breast cancer rehabilitation programmes.
September 2026
A relaxed community triathlon in South London with open water swim, stationary bike and dockside run where participants choose their own distances.
Multi-sport events at Willesden Sports Centre featuring a 400 m pool swim with 10 km bike and 5 km run options; entries for the September triathlon go via British Triathlon.
Sprint and Super Sprint triathlons at Hampton Pool feature pool swims in a 26°C lido, road cycling and runs beside Hampton Court with safety measures for open roads.
October 2026
A swim and run event at London Aquatics Centre and Queen Elizabeth Olympic Park on 31 October 2026, featuring a 400 m pool swim and a measured 5 km park run, with chip timing, race photos and a themed medal.
Monthly updates for London
Get new running races (and updates) in your inbox every month.
August 2027
London T100 Triathlon on 21 to 22 August 2027 offers multi-distance triathlon racing in central London, including the 100 km distance and age group qualifying spots for Qatar.