Antichasia (Greek: Αντιχάσια) is a mountain in the northern Trikala and Larissa prefectures in Thessaly, Greece. The mountain is a part of the Pindus mountain range. The GR-6/E92 is to the south, the Via Egnatia (Igoumenitsa - Kozani - Thessaloniki - Alexandroupoli) runs through the mountain ranges with a couple of tunnels in which construction started in the late-1990s and continued until the mid-2000s and the GR-15 (Kalambaka - Grevena - Siatista) and runs in the east-central portion and the GR-6 (Igoumenitsa - Ioannina - Trikala - Larissa) runs in the southwest. Its maximum elevation is 1,416 m. Its length is approximately 40 to 50 km from east to west and its width is approximately 15 to 20 km from north to south. The Pineios river...