9
Triathlons in Wales in September 2025
Find triathlons near me in Wales in September 2025 - filter by date or location, display on a map or use the advanced search to find your perfect race.
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- Sun 7 Sep
Bala, Gwynedd, UK
Rawson Group Triathlon Y Bala | Sprint Triathlon
- 750 m lake swimming
- 20 km road cycling + 587 ft ascent
- 5 km road running + 160 ft ascent
- Sun 7 Sep
Bala, Gwynedd, UK
Rawson Group Triathlon Y Bala | Standard Triathlon
- 1500 km lake swimming
- 37 km road cycling + 1181 ft ascent
- 10 km road running + 255 ft ascent
- Sat 20 Sep
Caernarfon, Gwynedd, UK
The Brutal Extreme Triathlon | The Brutal Bach Standard
- 0.6 mile lake swimming
- 28.99 miles road cycling
- 9.5 miles trail running
- Sat 20 Sep
Caernarfon, Gwynedd, UK
The Brutal Extreme Triathlon | The Brutal Canol Half
- 1.2 miles lake swimming
- 57.98 miles road cycling
- 14.7 miles trail running
- Sat 20 Sep
Caernarfon, Gwynedd, UK
The Brutal Extreme Triathlon | The Brutal Mawr Full
- 2.4 miles lake swimming
- 115.96 miles road cycling
- 25.1 miles trail running
- Sat 20 Sep
Caernarfon, Gwynedd, UK
The Brutal Extreme Triathlon | The Brutal Cawr Double
- 4.8 miles lake swimming
- 231.92 miles road cycling
- 51.1 miles trail running
- Sun 21 Sep
Llanfairpwllgwyngyll, Isle of Anglesey, UK
Superfeet Sandman Triathlon and Duathlon | Legend (70.3) Triathlon
- 1900 m sea swimming
- 93 km road cycling + 3175 ft ascent
- 19.8 km multi terrain running + 570 ft ascent
- Sun 21 Sep
Llanfairpwllgwyngyll, Isle of Anglesey, UK
Superfeet Sandman Triathlon and Duathlon | Sprint Triathlon
- 750 m sea swimming
- 22.9 km road cycling + 610 ft ascent
- 5.4 km multi terrain running + 144 ft ascent
- Sun 21 Sep
Llanfairpwllgwyngyll, Isle of Anglesey, UK
Superfeet Sandman Triathlon and Duathlon | Standard Triathlon
- 1500 m sea swimming
- 42.3 km road cycling + 1154 ft ascent
- 9.9 km multi terrain running + 282 ft ascent