Triathlon Calendar United Kingdom 2026-2027
Monthly updates for United Kingdom
Get new running races (and updates) in your inbox every month.
Explore the best triathlons in United Kingdom for 2026-2027! Our updated list features 227 exciting races across the country. Find your next race in United Kingdom below and join the running community at these great events! Search for a location or view races near London, Birmingham, Glasgow, Liverpool, Scotland or Wales.
September 2027
Closed-road triathlon at Willen Lake on 12 September 2027 with Sprint and Standard distances plus aquabike and relay options.
A seaside sprint triathlon on 11 September 2026 featuring a 750 m sea swim, 20 km bike and a flat 5 km run out to Wisemans Bridge and back.
Triathlon at Box End Lakes on 19 September 2027 offering Sprint, Standard, Odyssey middle distance, aquabike and relay options.
A multi‑discipline event in Wilmslow on 19 September 2027 offering sprint and double sprint triathlon, aquabike, aquathlon, relay and duathlon with entries closing 16 September.
A multisport IRONMAN event in Tenby with a sunrise swim on North Beach, a hilly bike along the Pembrokeshire coast, and a town centre run with large spectator support.
Monthly updates for United Kingdom
Get new running races (and updates) in your inbox every month.
Multi-discipline triathlon, aquabike and aquathlon races at Woodhorn Museum and QE2 Country Park on 19 September 2027, offered over sprint and standard distances.
October 2027
Multi-format race day at Oulton Park with duathlon and triathlon options plus an afternoon Fast 5km; venue and date are subject to confirmation.