Cloghoge River

The Cloghoge River, which rises on the south slopes of Tonduff Mountain near the Sally Gap is the Avoca’s headwater stream that is furthest from the sea (42 km as the crow flies).

It flows down to Lough Tay and then to Lough Dan, which also receives the Inchavore River draining the heavily forested Inchavore valley.

In the valley of the Cloghoge River as far as Lough Tay, the bedrock is mainly schist, but from there up to the Cloghoge’s source on Tonduff Mountain and beyond lies the great mass of Wicklow granite rocks, the largest in north-west Europe, which forms the distinctive rounded Wicklow mountains.