Greenane is a Hewitt of 801.3 m in Tipperary. It is the highest of the 5 register hills recorded in Tipperary; the next is Slievenamon at 720.2 m, 81.1 m lower.
It stands 160.1 m above its nearest neighbour, Cush, 3.8 km to the north-west. Of the 5 register hills in Tipperary, it has the smallest drop. It is one of only four register hills in the Galty Mountains region, with Galtymore, Temple Hill and Cush. The higher hill nearest to it, Galtymore, is a 3,000 ft mountain, 4.6 km to the west. The summit is marked by a trig point.