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 28 exciting races across the region. Find your next race in Wales below and join the running community at these great events!
October 2026
A 400m pool swim followed by a 5km flat tarmac run around Tonyrefail Park on 4 October 2026, with marshals, chip timing and accessible facilities.
Sprint triathlon and relay at Porthcawl Harbour with a 750 m swim, four lap bike and two lap coastal run; British Triathlon membership or race pass required.
March 2027
Sprint duathlon at Brunel Quay, Neyland: 5 km run, 21 km bike and 2.5 km run, British Triathlon permitted with relay options and a 200-place cap.
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.
Monthly updates for Wales
Get new running races (and updates) in your inbox every month.
April 2027
Sprint triathlon and aquathlon at Haverfordwest Leisure Centre on 11 April 2027 with a 400 m pool swim, 17 km bike, 5 km run and relay entry options.
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.
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.
Conquer the highest peak in Wales through a 36 km multi-activity adventure involving cycling, trekking, and kayaking in the heart of Snowdonia National Park.
Sprint triathlon in Swansea city centre with a 750 m swim, 20 km bike (three laps) and 5 km run on a flat, largely closed and marshalled waterfront course.
June 2027
Triathlon in Fishguard, Pembrokeshire featuring a sheltered harbour swim, open-road cycling and a coastal run with three distance options on 05 June 2027.
A middle distance triathlon at Parc Bryn Bach featuring a lake swim, a 60 mile bike through the Brecon moors and a three-lap 13.1 mile run; an aquabike option is available.
Multi distance triathlon and duathlon in Llanberis with a lake swim in Llyn Padarn, a bike route over the Llanberis Pass and a trail run through Dinorwig slate quarries.
Abersoch Triathlon in North Wales features Olympic and Sprint courses with a sea swim, bike laps, a mixed beach trail road run and a beach finish.
A coastal standard distance triathlon at Broad Haven with Aquabike and relay options, open water swimming, rural bike climbs and a coastal run.
Pool based triathlon at Caldicot Leisure Centre on 26 June 2027 with an indoor swim, traffic free grass cycle circuit, multiple distances, relay and kids races.
A six-lap Eliminator Swimrun in Aberdyfi mixing running and open water swims around the Dyfi Biosphere, scheduled for 26 June 2027.
Coastal triathlon and duathlon in Llandudno with sea swims by the pier, closed-road cycling on Marine Drive, and sprint and standard distances.
A lap-format swimrun at Tal Y Llyn in Snowdonia featuring 5.2 km laps with running and swims across a glacial ribbon lake amid Cadair Idris.