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!
August 2026
Multiple triathlon and aquathlon distances at Ebbw Vale Sports Centre, including junior races; proceeds support North Gwent Cardiac Rehabilitation & Aftercare Charity.
Open water aquathlon series in 2026 with three race dates offering sprint, mini sprint and super sprint distances at Secret Bar & Kitchen.
A four race midweek aquathlon series at Parc Bryn Bach held on Thursdays from May to August, featuring open water swims and mandatory wetsuits.
A muddy mini triathlon on 29 August 2026 with a 60 yard bog swim, 2 mile cross country cycle and 1 mile run. Competitors start three minutes apart and entry is £15 with age, gender and fancy dress prizes.
Monthly updates for Wales
Get new running races (and updates) in your inbox every month.
September 2026
Multi-distance triathlon at Bala with a Llyn Tegid lake swim, championship-standard racing on the Standard course, and support for Tom Harrison House.
A multi-sport festival at Saundersfoot Harbour on 11 September 2026 featuring swim events and sprint race options with entry prices from £40 to £190. Organised by Activity Wales Events.
Two days in the Brecon Beacons combining seated SUP, a 47 mile bike, a 13 mile Pen y Fan hike and varied day two activities supporting Ty Hafan and local community groups.
A full-distance IRONMAN in Tenby, Wales featuring an ocean swim on North Beach, a hilly bike along the Pembrokeshire coast and a town-centre run with large spectator support.
A 13 km open-water swim followed by a 13 km trail run along the Wales Coast Path back to Aberdyfi. Live GPS tracking is provided and swimmers must meet a minimum open-water pace requirement.
Sea swim in Mumbles Bay, a hilly bike around the Gower Peninsula and a fast seafront run; Olympic and Sprint distances, Ocean Lava qualifier on 26 September 2026.
Sprint duathlon in Mumbles on 26 September 2026: 5 km run, 32 km bike, 5 km run; entry from £75 and GPX course maps available.
Multi-distance triathlon and sprint duathlon at Newborough Forest with a beach start, sea swim and mixed road and trail courses on 27 Sep 2026.
October 2026
Experience an end of season sprint triathlon in Porthcawl featuring a harbour swim, a multi lap town cycle, and a flat coastal run along the Bristol Channel.
March 2027
A sprint duathlon in Neyland on 7 March 2027 with a 5k run, 21k bike and 2.5k run along the Milford Haven Waterway. Field limited to 160, relay teams welcome; British Triathlon membership or Race Pass required.
A duathlon at Margam Country Park combining trail runs around the castle and lake with rolling road bike courses featuring short climbs and fast flat sections.
April 2027
A pool-based sprint triathlon at Haverfordwest Leisure Centre featuring a 400 m swim, 17 km bike and 5 km run. Relay and aquathlon options are available and the field is limited to 160 competitors.
A mixed trail and road duathlon at the National Botanic Garden of Wales with two 5 km runs and a 30 km road cycle loop through Carmarthenshire countryside.