The Afon Tryweryn is one of the UK's premier whitewater destinations, flowing through Snowdonia National Park in North Wales near the town of Bala.

The river is dam-controlled, ensuring reliable high water levels and consistent flows throughout the year — a rarity among British rivers.

Rafting on the Tryweryn is centred at the National White Water Centre (Canolfan Tryweryn) at Fron-goch, the UK's original commercial whitewater rafting operation with over 40 years of experience.

The river is divided into two sections: an upper 2 km stretch of Class III–IV rapids running alongside the centre, and a lower Class II–III section extending roughly 6 km downstream toward Bala.

Several rapids have been modified over the years, with boulders repositioned to enhance the experience. The run suits both novice and experienced paddlers.