The Avonbeg River () rises on the northern flank of Camenabologue in the Wicklow Mountains and flows southeast into the valley of Glenmalure. It continues southeast through the villages of Greenan and Ballinaclash before joining the Avonmore at the Meeting of the Waters (Cumar an dá Uisce) to form the River Avoca, which in turn discharges into the Irish Sea at Arklow.
The Avonbeg River () starts on the northern side of Camenabologue in the Wicklow Mountains and flows southeast into Glenmalure Valley. It passes through Greenan and Ballinaclash villages before joining the Avonmore to form the River Avoca, which eventually drains into the Irish Sea at Arklow.