Experience Wales’ Most Legendary Triathlon & Duathlon

Set in the vibrant village of Llanberis, at the gateway to Eryri (Snowdonia), the Slateman Triathlon & Duathlon delivers a thrilling test of endurance against a backdrop of awe-inspiring landscapes and rich industrial heritage. Renowned by 220 Triathlon Magazine as one of the world’s finest races, it’s an unforgettable multisport experience.

Now held in June, the event benefits from warmer waters, spectacular views, and an incredible festival atmosphere—making it a must-do for both seasoned and first-time athletes.