Each of the main branches of the River Avoca - the Avonmore, the Avonbeg and the Aughrim rivers - have their origins in smaller tributaries, many of which rise in the Wicklow Mountains. The Glenealo, Glendasan and Annamoe rivers meet to form the Avonmore near Laragh. The Annamoe rises near Sally Gap and is joined by Cloghoge Brook between Lough Tay and Lough Dan and by the River Inchavore in Lough Dan. The Avonbeg rises on Table Mountain and the Three Lakes. The Avonmore and Avonbeg rivers join to form the River Avoca at the Meeting of the Waters in the Vale of Avoca, celebrated in the song The Meeting of the Waters by Thomas Moore. The Avoca is joined by the River Aughrim at Woodenbridge, sometimes referred to as the Second Meeting of the Waters. The Aughrim is formed at the junction of the Derry Water and the River Ow, the latter of which rises on Lugnaquilla.