Canolfan Tryweryn

It flows from Llyn Celyn in the Snowdonia National Park and after 19 km (12 mi) joins the river Dee at Bala.

Water is stored in winter when flows are high, and released over the summer to maintain the flow in the Dee, meaning that the river often has suitable water levels for kayakers and rafters at time of year when natural rivers throughout Wales may be too low.

The whitewater rapids have been modified by placing boulders in strategic points along the course of the river to create eddys, drops and play spots.

This section (commonly known as the Upper Tryweryn) is the main part of the Tryweryn, it runs for approximately 1.25 miles (2.0 km) from the site of the chipper down to the Tyn Cornel camping site, and is a good Grade III.

This section is not managed like the upper Tryweryn, although the centre has been known to remove fallen trees and other obstructions/hazards quickly.