The Geghama mountains (or Ghegam Ridge (variously transcribed into English as Gegam, Ghegam, Gegham, Ghegham, ISO 9985: Geġam)), Armenian: Գեղամա լեռնաշղթա (Gyeghama lyernashxt'a) are mountains in Armenia. is a tableland-type watershed basin of Sevan Lake from east, inflows of rivers Araks and Hrazdan from north and west, Azat and Vedi rivers from south-west and Arpachai river from south. The average elevation of the Geghama mountain range is near 2500m. The range is of volcanic origin including many extinct volcanoes. The range is 70 km length and 48 km width, and stretch between Lake Sevan and the Ararat plain. The highest peak of the Geghama mountains is the Azhdahak, at 3597m.