include Cyllene in the northeast 2376 m, Aroania in the north 2355 m, Erymanthos 2224 m and Panachaikon in the northwest 1926 m, Mainalon in the center 1981 m, and Parnon in the southeast 1935 m. The entire peninsula is earthquake-prone and has suffered many earthquakes in the past.

The longest river is the Alfeios in the west 110 km, followed by the Evrotas in the south 82 km, and also the Pineios,