AEA Expeditions
- Expedition & trekking service for Aconcagua, Tupungato, Pissis, Mercedario and peaks throughout the Andes. (location unknown)
- http://www.aeaexpeditions.com

ACONCAGUA TREK
- From 1979 in Aconcagua. Trekkings, expeditions, mules, transfers, camping in LOS PUQUIOS, base camp services
- http://www.rudyparra.com

Aconcagua Spirit
- Expeditions and trekking on Aconcagua, Volcan Lanin, Mercedario, and Penitentes as well as expedition logistical support. (Mendoza, Argentina)
- http://www.aconcaguaspirit.com.ar

Climb Ecuador
- Offers full-service climbing trips to the Andes Mountains of Ecuador, Bolivia and Peru, also itinerary, photos and trip reports. (New York, New York)
- http://www.climbecuador.com

Cabeça Verde School of Rock Climbing
- Rock climbing instruction and guided climbs. Includes a history of the school and information about local climbing areas. (Rio de Janeiro, Brazil)
- http://www.climbinrio.com/

Adventure Planet
- Offers climbing and mountaineering trips in Bolivia or Patagonia in Argentina and Chile. Content in English and Spanish.
- http://www.planetaventura.com

Andesport
- Aconcagua expedition services including guide service and transport. Content in English, Spanish, and French.
- http://www.andesport.com/

Inka Expeditions
- Offers guided expeiditons to Aconcagua. Includes trip information, guide biographies, and customer comments. Content in English and Spanish. (Mendoza, Argentina)
- http://www.aconcagua.org.ar/

Aconcagua 2002
- Aconcagua expeditions. Gear list, itinerary, and past expedition reports. (Mendoza, Argentina)
- http://www.aconcagua2002.com.ar

Aconcagua Adventures
- Aconcagua expeditions and logistical support. (Mendoza, Argentina)
- http://www.aconcaguaadventures.com/