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Triathlons in Gwynedd
Find triathlons near me in Gwynedd for 2025/2026 - search by date or place, display on a map or use the advanced search to find your perfect race.
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Click an event for full event details, location, route, sustainability, what's included and how to enter.
- Sat 9 May 2026
- £195-£225
- Sat 9 May 2026
- £195-£225
Pwllheli, Gwynedd, UK
THE ROC WALES
The totally unique ROC format, from Abersoch Bay to the top of Wales’ highest mountain and back. Swim, Bike, Mountain, Bike, Run; THE ROC WALES is triathlon - tough and redefined.
- Recycling
- Plastic bottle free
- Entertainment
- Music
- Chip timing
- Enter online
- Hilly
- Mountainous
- Event village
- Event expo
- Coast
- Mountains
- Sustainability policy
- Plastic-free event
- Age 18 & over
- 1.5 km sea swimming
- 100 km road cycling
- 13 km multi terrain running + 3330 ft ascent
- Sat 21 Jun
Pwllheli, Gwynedd, UK
Menai Holiday Cottages Abersoch Triathlon | Olympic Distance Triathlon
- 1500 m sea swimming
- 40 km road cycling
- 10 km multi terrain running
- Sat 21 Jun
Pwllheli, Gwynedd, UK
Menai Holiday Cottages Abersoch Triathlon | Sprint Distance Triathlon
- 750 m sea swimming
- 20 km road cycling
- 5 km multi terrain 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
- 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