Chelmos mountain is located in the south part of Peloponnese, mostly in the Achaia prefecture and less in the Corinthian prefecture. in the Ancient times it was called Aroania.
It has an altitude of 2.355m.

In the mount of Chelmos operates the Kalavryta ski resort, in an altitude between the 1700 and 2340m.
Kalavryta ski center is the second largest in Greece and attracts many visitors every year.