Wales
Triathlon Calendar Wales 2026-2027
Monthly updates for Wales
Get new running races (and updates) in your inbox every month.
Explore the best triathlons in Wales for 2026-2027! Our updated list features 32 exciting races across the region. Find your next race in Wales below and join the running community at these great events!
May 2027
Sprint-distance triathlon in Llanelli with a 750 m open water swim, 26 km bike and 5 km run; includes relay entries and forms part of the Llanelli Multi-Sport Festival.
A two-day SUPBIKERUN at Fforest Fields combining paddle boarding, road cycling and trail running with chip timing, camping options and equipment hire.
A city-centre sprint triathlon on the Swansea waterfront with a dock swim and flat three-lap bike and 5 km run, entry from £84.99.
June 2027
A Pembrokeshire triathlon on 05 June 2027 with a sheltered harbour swim, road bike sections and coastal run, offered over sprint, Olympic and middle distance formats.
Multi-distance triathlon and duathlon in Llanberis, Eryri on 13 June 2027, with Sprint to full Iron-distance options and chip-timed results.
Monthly updates for Wales
Get new running races (and updates) in your inbox every month.
Seaside triathlon in Abersoch with Olympic and Sprint courses, a sea swim, bike laps, and a beach finish with music and a beach bar.
Standard distance triathlon and aquabike at Broad Haven featuring a sea swim, coastal run and a 400 competitor field limit.
Coastal triathlon and duathlon in Llandudno with sea swims by the pier, closed-road cycling on Marine Drive and sprint and standard distances.
July 2027
A coastal IRONMAN 70.3 in Swansea on July 11, 2027 featuring a Prince of Wales Dock swim, a flat coastal bike course and a run through Swansea city and waterfront.
Swimrun along the Pembrokeshire Coast National Park with full and sprint routes, solo or team options; entries are currently closed.
Multi terrain triathlon and duathlon at Plas y Brenin in Eryri, featuring lake swims, mountain road cycling and trail runs across Sprint, Standard and 70.3 distances.
August 2027
Pool-based triathlon at Caldicot Leisure Centre with indoor swim, traffic-free grass cycle and run circuits, multiple distances and relay and youth events.