First Ascent Climbing Services, Inc. Guide service and climbing school. http://www.goclimbing.com/

Four Season's Guides Specializing in off-piste powder skiing and ski mountaineering in the winter, and mountain climbing in the summer. http://www.swissguides.com/

Friends Adventure Team They provide expedition, peak climbing and adventure tourism in Himalayan Region - Nepal, Tibet, Bhutan, educational tour, student and more. http://www.friendsadventure.com/

Garhwal Adventure Offers trekking, wildlife, birdwatching, yoga, and river rafting tours in the Himalayan region. http://www.garhwaladventure.com/

Geographic Bureau Offers climbing and cultural tours on Mount Elbrus in Russia, Peak Lenin and the Fann Mountains in Central Asia, and trekking in Georgia. http://www.geographicbureau.com/

Granite Arches Climbing Services Rock and ice mountaineering expeditions in the Peruvian and Ecuadorian Andes. Also offers instructional workshops in the American Southeast. http://www.granitearches.com/

High Asia Mountain Travel Co. Offers custom climbing trips to all areas of China, from far western Tibet to the Chang Tang. http://www.highasia.com/

High Trek Snowdonia Offers guided and self-guided trekking holidays in North Wales, including long weekend courses and breaks in climbing, scrambling, navigation, and more. http://www.hightrek.co.uk/

Highmountain Wave Trekking Peak-climbing and rafting packages to Nepal, Tibet, Bhutan, and Sikkim. http://www.nepalmountain.com/

Himalayan Experience Offers guided expeditions to Everest, Cho Oyo, Ama Dablam, and Everest North Col. http://www.himex.com/

Home Planet Exploration Specializes in mountaineering and trekking adventures through the Andes and safaris in East Africa. http://www.planetexploration.com/

INKA Expeditions Offers guided trekking expeditions to Acongagua and other mountains in the Andean range. http://www.aconcagua.org.ar/

International Mountain Guides Leading mountaineering, climbing, and trekking expeditions worldwide including Everest, Cho Oyu, Kilimanjaro, the Alps, and more. http://www.mountainguides.com/

Jay Philbrick, Climbing Guide AMGA certified rock and alpine climbing guide. http://www.jpclimbingguide.com/

Journeys Mountaineering & Trekking Organizes vacation activities in Nepal and throughout the Himalayas. http://www.journeys-nepal.com/

K2 Aviation and Adventures Climbing expedition information, flightseeing tours-including glacier landings, and adventure packages. http://www.flyk2.com/

Kent Mountain Adventure Center Offers wilderness adventure courses in backpacking, rock climbing, kayaking, mountain biking, and 'no-impact' camping. http://www.kmaconline.com/

Lameyre, Vincent Mountain guide offering ski mountaineering, off-piste skiing, summer mountaineering, rock climbing, and more. http://www.vincent-lameyre.com/

Mercury Himalayan Explorations Organizes eco-friendly trekking, river rafting, climbing, and safari adventures in the Indian Himalayas. http://www.himalayanadventure.com/

MICA Guides Offers hiking and ice climbing on Matanuska Glacier in Alaska. Adventure trips also available. http://www.micaguides.com/