The Ara (sometimes spelled Arra) takes its name from the ancient territory of Ara (Aradh, Tir Arad, Dál Cairbri Arad) in which it is found, ruled by the Ó Donnagáin (O'Donegans).

It flows north, passing under the R662 near Mount Bruis village and meeting a tributary in Shronell.

The Ara flows southward past Tipperary Golf Club and then eastward through Bansha Wood.

As with many tributaries of the River Suir, the Ara is a noted brown trout fishery.

[5][6] A restaurant on Abbey Street, Tipperary, just yards from the river, bears the name "The Brown Trout".