River in
Ireland, rising in the Devil's Bit Mountains and flowing south across the lowland of
County
Tipperary through Thurles to the foot of the Knockmealdown Mountains. There it
receives the Tar (another river) and bends through an elbow-shaped
loop to
flow north around the
western edge of the Comeragh Mountains. The river then enters a long west–east valley
guarded on the south by the Comeraghs and
limestone lowlands on the north. In the
1760s the river was made
navigable to
Clonmel, but the
tidal limit is Carrick-on-Suir. Finally
the river broadens into an
estuary and passes through
Waterford. A little farther east,
after a course of 114 mi (183 km), the Suir is joined by the
Barrow and the
Nore. All three
rivers enter the wide estuarine bay known as Waterford Harbour.
The rivers
Nore,
Suir and
Barrow are known as
The Three Sisters