Lake Sevan is located in the Gegharkunik Province.The lake is 1900 m above sea level. Sevan is one of the largest freshwater high-altitude lakes in the world.The area is 1240 km2; the depth – 83 m. From the South the lake is surrounded by Vardenis Mountains, from West – Geghama Mountains, from North-West – Pambak Mountains, from North-East – Areghun Mountains.
Lake Sevan is the third largest lake on the Armenian plateau, after Lake Van and Urmia.
28 rivers flow to Sevan Lake. The most prominent ones are Gavaraget, Argichi, Martuni, Karchaghbyur, Masrik, Dzknaget. Only the river Hrazdan starts from Lake Sevan.