Pindus National Park (Greek: Εθνικός Δρυμός Πίνδου Ethnikós Drymós Píndou), also known as Valia Calda (meaning the Warm Valley in Aromanian), is a national park in mainland Greece, situated in an isolated mountainous area at the periphery of West Macedonia and Epirus, in the northeastern part of the Pindus mountain range.

[1] The park's core zone, 3,360 hectares (8,300 acres), covers the greatest part of the Valia Calda valley and the slopes of the surrounding peaks.

The park lies on the borders of Grevena and Ioannina regional unit, north of the town of Metsovo[4] and near the villages of Vovousa, Perivoli and Milea.

[7] The park was created in 1966 and considered one of the most important protected areas for the maintenance of mountainous biodiversity and ecosystem integrity at the national level.

[8] Forests of European black pine (Pinus nigra) and common beech (Fagus sylvatica) cover the park's lower and middle altitudes 1,000 to 1,600 m (3,300 to 5,200 ft), with several of these trees being more than 700 years old.

[6] Additionally, the dry places and the lower parts of the valley are characterized by the domination of Buxus sempervirens, while some individuals of Abies borisii-regis are scattered among the Pinus nigra and Fagus sylvatica forests.

[10] Moreover, rare species of the forests of Pindus mountains, typical of the lower geological layers, are Minuartia baldacci, Bornmuellera tymphaea, Campanula hawkinsiana, Viola dukadjinica and Silene pindicola.

[19] The 'Northern Pindus Management Body', together with the local forest service, is responsible for regulating human activities and maintaining the ecological value of the protected area.

[8] The core of the national park has been declared a 'biogenetic reserve' zone by the European Council with human activities such as woodcutting, grazing, hunting, fishing and access by car prohibited.

This initiative will have a negative impact on the park since a great part of the existing forest area will be covered by water, resulting in the reduction of the core zone.

Another danger is the high grazing pressure in the core area,[1][13][16] while a number of small coal-producing units at the outskirts of the park have raised a lot of concern.