It is generally agreed that the region of Orestis encompassed the area around
Lake Kastoria and the upper
Haliacmon basin. The region was bounded geographically by the mountains
Voio,
Vitsi and
Grammos and it extended to Prespa Lakes basin, in particular around
Small Prespa Lake, where the ancient settlement of Lyke was located. Orestis bordered to the southwest
Molossians and other Epirotic peoples, to the northwest
Dassaretia, to the west
Parauaia, to the northeast
Eordaea and to the southeast
Elimiotis. . There is an overall agreement only for the eastern borders of the region, while about the rest of the Orestis' border areas there is some disagreement in scholarship. For Hammond, Orestis to the southeast ended after the point where the Pramoritsa flows into the Haliacmon (near
Trapezitsa), while for Papazoglou it extended southwest of this point up to
Palaiokastro and
Siatista. For Papazoglou, the border with Dassaretia was defined by the
Cangonj Pass while the
Bilisht-Poloskë valley to the east of the pass was part of Orestia. Papazoglou adds that the mountains of Morava (between Korcë plain and Poloskë basin) and Grammos probably formed the border with Dassaretia and Parauaia. Karamitrou-Mentesidi is in favour of an excessive western expansion on lake Maliq and the region of today's
Korcë. In general modern scholarship agrees on the western border of Orestis being found slightly west from the modern Greek-Albanian border. The northern boundary of Orestis corresponded to the southern shore of Small Prespa Lake. Some important cities in the Orestis region based on ancient sources were
Argos Orestikon,
Celetrum (Kelethron), Diokliteionopolis, while epigraphic evidence cofirms the existence of
Battyna and Lykke. Orestis was traditionally a district of
Upper Macedonia, forming its heartland in the Archaic and early Classical periods. It bordered with
Lynkestis to the north,
Eordaia to the north-east,
Elimiotis to the south-east,
Tymphaea to the south, and
Illyrians to the west. Orestis formed the western border of Upper Macedonia, and Illyrians beyond this district constituted a persistent menace to the stability of the
Kingdom of Macedon. Orestis was among the regions of Upper Macedonia where the inhabitants were tribal peoples, who gave their name to the territory which was under their control, or alternatively who took their name from that territory. The tribal people that inhabited Orestis were the Orestae. Orestis, like the rest of Upper Macedonia, was characterized by cold winters with rainfalls that were very heavy, and hot summers. In this region life was hard and mainly a matter of survival. According to the season of the year, the mostly nomadic pastoralist people of the area moved their flocks of cattle, goats and sheep to the various pasture lands. The region of Orestis was rich in summer pastures. ==History==