River Suck
The River Suck is approx. 80 kilometres in length. The River Suck flows along the natural border between counties Galway and Roscommon. The Suck River Valley is a 5 mile wide corridor each side of the River Suck, and boasts a population of approximately 8,000. It is the main tributary of the River Shannon. It meets the Shannon a few kilometres north of the village of Shannonbridge. The Suck divides the counties of Galway and Roscommon.
Ballinasloe is the largest town located on the Suck. The quiet beauty and natural charm of the green valley is gently reflected in it's "Nine Friendly Villages", Ballygar, Creggs, Glinsk, Ballymoe, Ballintubber, Donamon, Castlecoote, Athleague and Mount Talbot.

River Shannon
The River Shannon is, at 386 km (240 miles), Ireland's longest river. It divides the west of ireland from the east and south. The river represents a major physical barrier between east and west, with fewer than twenty crossing-points between Limerick City in the south and the town of Carrick on Shannon in the north.
Portumna is the principal town in County Galway on the River Shannon.

Clare River
Clare River which flows through Milltown, Tuam and Claregalway reaches Lough Corrib at Annaghdown.

Dunkellin River
The Dunkellin River rises in the Loughrea area. The river then flows right across East Galway (for around 25 miles), and enters the Atlantic Ocean (near Kilcolgan) into Galway Bay.

The Owendallaigh River
The Owendallaigh river in South Galway flows west into Lough Cutra near Gort.

Owenriff River - Oughterard
The Owenriff River starting in the Connemara mountains, flowing through Oughterard and emptying at the edge of town into Lough Corrib.

 
See Lakes in County Galway