sentences:  The mountains run from the Peloritani on the eastern part of the island to the foothill of the Madonie mountains to the west, facing the Tyrrhenian Sea on the north.Mount Etna, from which it is separated by the rivers Alcantara and Simeto, forms the range's southern border.Several of the peaks are above 1500 meters with the highest being the Monte Soro (1,847 m) and the Serra del Re (1,754 m).