Mount Parnitha (Greek, modern: Πάρνηθα, ancient/Katharevousa: Πάρνης Parnis/Parnes; sometimes Parnetha) is a densely forested mountain range north of Athens, the highest on the peninsula of Attica, with an elevation of 1,413 m and a summit known as Karavola (Καραβόλα). Much of the mountain is designated a national park, and is a protected habitat for wildfowl, first created in 1961. The summit is located 18 km N of Acharnae and about 30 km N of Athens, while the mountain covers approximately 250 km² of land. Other peaks include Mavrovouni (Μαυροβούνι), Ornio (1,350 m), Area (1,160 m), Avgo or Avgho (1,150 m), and Xerovouni (Ξεροβούνι, meaning dry mountain - 1,120 m).It also has two shelters Mpafi and Flampouri.

Towns surrounding the mountain include Aspropyrgos (Thria), Fyli, Acharnae/Menidi, Varymbombi, Thrakomakedones, Decelea, Avlona and Aghios Stefanos as well as the settlement of Agios Merkourios. The highway GR-1 aka E75 surrounds the northern and eastern part of the mountain along with the Cephissus river, while the Attiki Odos motorway (GR-6) runs to its south. The mountain offers panoramic views of the mountains northeast of Parnitha, Penteli to the east, the Ymittos to the southeast, the Aigaleo to the south and another to the west; from its summit, one can also see the Thriasian Plain, the Saronic Gulf including the islands of Salamina, Aigina and the North, the South Euboean Gulfs and island of Euboea, and most of central and northern Greater Athens. The view during clear days can extend to northern Viotia and the Peloponnese.