Gegham mountains (or Ghegam Ridge, ISO 9985: Geġam), Armenian: Գեղամա լեռնաշղթա (Gyeghama lernasheghta) are a range of mountains in Armenia. The range 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.