Galtymore's summit is described a large concave plateau separated by two peaks. The plateau consists of Old Red Sandstone and is known as Dawson's Table after the historical landowners, the Dawson-Massey family. This is similar to Percy's Table on the summit of Lugnaquilla, the highest mountain in County Wicklow and Leinster. There is a cairn on top of each peak and the eastern one marks the true summit of Galtymore. These twin summits give Galtymore a distinctive profile from a distance. The summit of Galtymore marks the boundary of Limerick and Tipperary.