Lake Trichonida, also Trihonida or Trikhonida (Greek: Τριχωνίδα), older forms: Trihonis and Trikhonis ancient: Trichonis is the largest natural lake in Greece. It is located in the eastern part of the Aitoloakarnania prefecture and is located east of Agrinio, south of Evrytania and northwest of Nafpaktos. The area is 98.6 km² with the length of 19 km and the depth of 58 m. The lake used to cover the central part of the prefecture as well, and a million years ago was large enough to cover the central part of the modern prefecture, a part that is now a plain. The lake later dried up and is in the eastcentral portion of the prefecture today. The municipalities with shores on the lake are Thermo, Makryneia, Arakynthos, Thestieis, and Paravola.
Around the lake are beautiful forests with maples, pines and other trees. The lake and environs is home to about 200 birds. Close by there is also farmland and various villages, one of them being Myrtia.
On April 11, 2007, an earthquake struck in the early hours, between 2 and 6 A.M. It woke up many residents who had to evacuate their homes. The epicenter was in the lake. It also produced more earthquakes between 10:13 and 10:15 AM and another several minutes later. It was measured at 5.3, 5.4, 5.6 and 5.7 on the Richter scale. It caused damage around the area.
