This post is a list of some of the largest mountain ranges on Earth. The mountain ranges are organized by continent and alphabetically. I have also provided the maximum elevation for each mountain range. There are 19 mountain ranges listed below. Source: Wikipedia
Africa
Atlas Mountains (Northern Africa) - 4,167 m
Photo source: Wikimedia Commons, Kobersky
License: CC BY-SA 2.5
Ethiopian Highlands (Ethiopia) - 4,550 m
Photo source: Wikimedia Commons, Hulivili
License: CC BY 2.0
Great Escarpment (Southern Africa) - 3,000 m
Photo source: Wikimedia Commons, Drakensberg
License: CC BY-SA 2.0
Antarctica
Transantarctic Mountains (Antarctica) - 4,528 m
Photo source: Wikimedia Commons, Andrew Mandemaker
License: CC BY-SA 2.5
Asia
Caucasus Mountains (Caucasus) - 5,642 m
Photo source: Wikimedia Commons, Thomas Taylor Hammond
License: CC BY-SA 4.0
Hengduan Mountains (China) - 7,556 m
Photo source: Wikimedia Commons, Kogo
License: CC BY-SA 3.0
Himalayas (Central Asia) - 8,848 m
Photo source: Wikimedia Commons, Naveedhamiya
License: CC BY-SA 3.0
Karakoram (Central Asia) - 8,611 m
Photo source: Wikimedia Commons, Guilhem Vellut
License: CC BY-SA 2.0
Kunlun (China) - 7,167 m
Photo source: Wikimedia Commons, Alliance francaise de Wuhan
License: CC BY-SA 3.0
Hindu Kush (Afghanistan, Pakistan, Tajikstan) - 7,708 m
Photo source: Wikimedia Commons, Master Sgt. Andy Dunaway, U.S. Air Force
Nyenchen Tanglha Mountains (China) - 7,090 m
Photo source: Wikimedia Commons, 张骐
Pamir Mountains (Central Asia) - 7,649 m
Photo source: Wikimedia Commons, FrancisTyers~commonswiki
License: CC BY-SA 3.0
Tian Shan (Central Asia) - 7,439 m
Photo source: Wikimedia Commons, Chen Zhao
License: CC BY 2.0
Australia
Great Dividing Range (Australia) - 2,228 m
Photo source: Wikimedia Commons, fir0002/Flagstaffotos
License: CC BY-NC 3.0
Europe
Alps (Switzerland) - 4,808 m
Photo source: Wikimedia Commons, Abaddon1337
License: CC BY-SA 3.0
Ural Mountains (Russia) - 1,895 m
Photo source: Wikimedia Commons, O.s.zlatoustovez
License: CC BY-SA 4.0
North America
Alaska Range (North America) - 6,201 m
Photo source: Wikimedia Commons, Frank K.
License: CC BY 2.0
Rocky Mountains (North America) - 4,401 m
Photo source: Wikimedia Commons, Nmadhubala
License: CC BY-SA 2.5
South America
Andes (South America) - 6,961 m
Photo source: Wikimedia Commons, Jorge Morales Piderit