The Little Brosna River (Irish: An Bhrosnach Bheag)[3] rises near Dunkerrin, County Offaly, Ireland.

[14] An electric fishing survey of the river at Riverstown was conducted in September 2012 by Inland Fisheries Ireland.

[15] Some good Fishing can be had around Shinrone and Birr during the months of late spring and early Summer.

Dry Fly Fishing is the preferred method used by anglers To catch Trout on the river.

In some cases, Spinning can be used to catch some of the bigger brown trout Inland fisheries Ireland operate a Fish Farm Outside Shinrone, near Brosna.

It forms part of the Little Brosna Callows Area of Scientific Interest, which is of international importance as a wildfowl habitat and as a classical example of a flood plain ecosystem.