Mount Erymanthos (Greek: Ερύμανθος, Latin: Erymanthus) overall is an irregular massif of peaks connected by ridges embedded in the mountains located in the north of the Peloponnese, Greece.

The topography close-up depicts a three-peak complex, three main peaks, of course, as any terrain presents many bumps under various descriptions.

To find a parent of Olenos in the Peloponnesos, however, one must travel all the way to Mount Kyllini in Korinthia, 49.6 km (30.8 mi) to the east, which has an elevation of 2,374 m (7,789 ft).

This Mount Erymanthos is visible from below at 37°56′53″N 21°51′18″E / 37.948106°N 21.854954°E / 37.948106; 21.854954 on the left side of the road in the village of Platanitsa, Achaea.

Historically, Mount Erymanthos was part of northwestern Arcadia, where it was the second-tallest mountain range.

Olenos, on the other hand, is Greek for ulna, "forearm," although the reason for the name has been lost (some sort of bend has been suggested).

More recently (1992 and after) the problem of definition was confronted by the Greek government in compliance to the European Union's Habitats Directive of 1992 requiring its member states to establish Protected areas in the Natura 2000 network.

Erymanthos received its own protected area named oros Erymanthus and identified with the ID of GR2320008.

It was proposed to the Ministry of the Environment and Energy (Greece) as a "Site of Community Importance (SCI)" in 1997, but was not confirmed as such until 2006.

[4] The periphery is dotted with small villages placed at the ends of access roads slightly up on the base of the mountainous terrain.

The answer of course was to expand the protected area to cover the whole mountain in both Achaea and Elis, but once legal entities have been created, they cannot be easily changed.

[5] This area included GR2320008, but reached into Elis to embrace the rest of the massif, approximately doubling the protected region.

A representative NW-SE distance is 16 km (9.9 mi); that is to say, the mountainous terrain is approximately ovoid with the long axis NW-SW.

Drainage to the east is pre-empted by the higher mountains of Arcadia, which also drain to the west into the Alfeios.

Overall the Erymanthos River flows directly south from the col between Psele Tourla and Lepidas a distance of about 51.8 km (32.2 mi) to intersect the Alfeios as a right-bank tributary.

The upper half is highly dendritic merging dozens if not hundreds of temporary streams in converging ravines.

The river has great recreational value, including white-water rafting, but there is a growing danger of pollution from farm run-off and unprocessed waste water.

The villages of south area of Panachaiko and Omplos are located in an agriculturally rich valley between the peaks of Erymanthos.

The mountain is the source of the Pineios river to the southwest, Selinountas to the east, Erymanthos to the south, and Peiros and Parapeiros to the southeast.

The view from the summit of Erymanthos includes most of the western and northwestern Peloponnese, northern Arcadia, and the hills of eastern Ilia.

Erymanthos appears once in the supposed works of Homer, the legendary author traditionally credited with the two epic poems, Iliad and Odyssey, as well as some others.

There is scant mention of Erymanthos in these poems,[9] only that Artemis "goes among the mountains (ourea), ridged Taygetus or Erymanthus, delighting in the boars (kaproi) and the swift deer (elaphoi) with the Nymphs."

The stage is set for the myths of the Erymanthian boar, one of the Labours of Hercules, and of the centaur, Folus.

Any author before then might have access to previously lost information, and is considered fair game for hunting old stories of Hercules.

In the Aegean, this predominance ended at the beginning of a period of social disorder called the Greek Dark Ages.

A cause, or symptom, depending on the historical model, was the southward migration of people armed with iron weapons.

A conventional date for this victory of disrupting, better-armed northerners is about 1000 BC, but of course the period began before and ended after.

Politically it was characterized by the dominance of Argolis, one of the regions of Ancient Greece, especially of one citadel in it, Mycenae, the home of high king Agamemnon, who led the Achaeans against Troy in the Trojan War.

Between the Byzantine Empire and the Greek War of Independence, several villages were founded, including Skiada and Oreino.