Gwynedd
Triathlon Calendar near Gwynedd 2026-2027
Monthly updates for Gwynedd
Get new running races (and updates) in your inbox every month.
Explore the top triathlons near Gwynedd for 2026-2027! We've gathered 9 exciting races in the area. Check out our detailed list below to find your next local race.
September 2026
Triathlon y Bala features lake starts at Llyn Tegid and three distances; the 2026 Standard hosts national and age-group championships and supports Tom Harrison House.
A long-distance aquathlon in Aberdyfi combining a 13 km open-water swim with a 13 km coastal trail run, supported by drop-bag logistics and live GPS tracking.
Triathlon and duathlon at Newborough Forest and Traeth Llanddwyn Beach on 27 Sep 2026 with sea swims, mixed road and trail runs, and multiple distance options.
October 2026
June 2027
Multi-distance triathlon and duathlon in Llanberis with lake swims, the Llanberis Pass bike climb and trail finishes through the Dinorwig slate quarries.
Monthly updates for Gwynedd
Get new running races (and updates) in your inbox every month.
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 six-lap eliminator swimrun in Aberdyfi combining short trail runs and open-water swims around the UNESCO Dyfi Biosphere.
A swimrun at Tal Y Llyn in Snowdonia with 5.2 km laps mixing running and lake swims near Cadair Idris, on mainly flat hard-surface terrain.
July 2027
Multi-discipline races in Eryri featuring a lake swim, mountain road cycling and a trail run beneath the skyline of Yr Wyddfa.