Wales
Triathlon Calendar Wales 2027
Monthly updates for Wales
Get new running races (and updates) in your inbox every month.
Explore the best triathlons in Wales for 2027! Our updated list features 35 exciting races across the region. Find your next race in Wales below and join the running community at these great events!
March 2027
Sprint duathlon at Brunel Quay, Neyland on 7 March 2027 featuring a 5 km run, 21 km bike and 2.5 km run; individual and relay entries, field capped at 200.
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.
Sprint triathlon at Newport International Sports Village with a 400 m pool swim, 22.5 km flat road bike and 5 km flat run, open to competitors aged 15 and over.
April 2027
Sprint triathlon and aquathlon at Haverfordwest Leisure Centre on 11 April 2027 with a 400 m swim, 17 km bike and 5 km run; relay entries available.
Second-edition duathlon at the National Botanic Garden of Wales combining two 5 km trail runs with a 30 km road bike loop; chosen as stage 1 of the Triathlon Cymru Super Series 2027.
Monthly updates for Wales
Get new running races (and updates) in your inbox every month.
May 2027
Coastal to summit multi-discipline event from Abersoch Beach to Snowdon and back covering 115 km with swim, bike, mountain run and beach finish.
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 weekend event at Fforest Fields combining SUP workshops, road cycling and trail running with two distance options, paddleboard hire, camping and chip-timed results.
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 on Swansea waterfront with a 750m swim, 20km bike in three laps and a 5km run; entry from £84.99 on 23 May 2027.
June 2027
Triathlon in Fishguard with a sheltered harbour swim, country bike and coastal run on 05 June 2027; entries from £79.
Lap-based swimrun at Tal Y Llyn combining tarmac running and open-water swims, with laps of 5.2 km and up to 31.2 km total in the Cadair Idris area.
A four dimensional two day adventure race in Hay-on-Wye that combines outdoor disciplines with case-study management development, senior networking and charity fundraising.
A middle distance triathlon at Parc Bryn Bach in the Brecon Beacons with a 1.2 mile swim, 60 mile bike and 13.1 mile run.
A lake-to-mountain triathlon in Llanberis with swim in Llyn Padarn, a climb up the Llanberis Pass and trail finishes through the 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.
Standard-distance coastal triathlon at Broad Haven with 1.5 km swim, 42 km bike and 10 km run; Aquabike and relay options, field capped at 400.
Pool-based triathlon at Caldicot Leisure Centre on 26 June 2027 with traffic-free grass cycle and run circuits, multiple distance options and a team relay.
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 a crowd lined promenade run.