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 7 exciting races across the region. Find your next race in London below and join the running community at these great events!
November 2026
A routed run from Hampstead High Street to Brockwell Park of about half a marathon through London parks and ponds with swims included and a relaxed club atmosphere.
February 2027
A roughly half a marathon run through London parks and lidos from Hampstead to Brockwell Park with organised swims and a kit van, organised by Above Below.
March 2027
Run bike run event at Hillingdon Cycle Circuit on 14 March 2027 with traffic free laps and races for adults and youth.
May 2027
Hatch End Harrow Triathlon in London offers pool swims, bike and run stages across adult and junior categories, organised by a local grassroots club.
August 2027
Multi-distance triathlon weekend in London featuring the T100 100 km race and Olympic distance events, freshwater swim with mandatory wetsuits, flat bike and run, and relay teams.
Monthly updates for London
Get new running races (and updates) in your inbox every month.
Beginner-friendly triathlon at Surrey Docks with open water swims, static bikes and flat run/walk routes focused on community and participation.
October 2027
An aquathlon at London Aquatics Centre and Queen Elizabeth Olympic Park featuring a 400 m pool swim followed by a 5 km run around South Park.