[2] The River Funshion rises in the Galtee Mountains at Kilbeheny, near the County Limerick–County Tipperary border.

It then flows westwards and forms part of the County Limerick–County Cork border, passing under the M8 again, and the R639 at Kilbeheny.

It flows westwards through Mitchelstown Golf Club, north of the town.

The Funshion passes under the N73 near Kildorrery, flowing southeast through Glanworth and again under the M8 and R639, draining into the Munster Blackwater about 3.5 km (2 mi) downriver of Fermoy.

The River Funshion is a brown trout and salmon fishery.