Trek Thailand - Offers small-group trekking and camping tours and travel information on national parks.
Trekking Collective Co. - Customizes trekking and adventure tours to Northern Thailand, the Mekong river regions, Angkor Wat, and neighboring countries.
Trekking in Nepal - 1987 trek through the Everest and Annapurna regions.
Trekking Mongolia - Organizes adventure treks, horse riding tours, and sight seeing tours that explore Mongolian natural and cultural wonders.
Trekking Team - Offers climbing, mountaineering, and heli-tours in Nepal.
Trekking the Annapurna Circuit - Guide to a 300 kilometre trek in Nepal around the Annapurna mountain range in the Himalayas. Site includes YetiCam, photos, and maps.
Trekking Tibet Information - Includes information about Tibet, custom trips, expeditions, and sightseeing tours.
TrekkingChile.com - Includes descriptions of mountain routes and kayak tours in Chile. Also features a photo gallery, hikers' chat, accommodation lists, and tour packages.
TrekTrek - Offers hiking, rafting, climbing, and outdoor tours in Slovenia.
Ultralight Hiking - Aids in the reduction of pack weight in preparing for long distance hiking or tramping. Includes gear reviews and links to lightweight product sources.
Unique Path Trekking and Expedition - Experience high adventures against the magnificent backdrop of the Himalaya Mountains through Nepal, Tibet, Bhutan, and India.
Venture West - Trips designed for the older traveller and rated according to difficulty. Destinations include San Miguel de Allende, Nepal, and several U.S. national parks.
Voyageur Hiking Trail Association - Nonprofit citizens' group dedicated to developing and maintaining a continuous hiking trail for public use across Northern Ontario.
Walk & Yak Holidays - Trekking and climbing holidays in the Himalayas, Nepal, Tibet, Bhutan, and India.
Walkers Expedition Pvt. Ltd. - Offers trekking, mountaineering, and rafting in Nepal as well as Tibet. Site features trekking and tour itinerary, contact details, and country information. In German.
Walking Boots Tours - Offers walking and hiking tours on the Dingle Peninsula. Covers scenic coastal and hilly terrain.
Walking the World - Offers walking trips around the world for people 50 and better.
Walkingtom.com - Young man attempts to walk coast to coast across the United States over the span of several years.
Wanderweg Holidays - Specializes in walking and hiking tours of the Swiss and Austrian Alps.
Washington Trails Association - Nonprofit membership organization working to preserve and enhance Washington's trail system. Features extensive trail reports, photos, and advocacy news and events.
Wayfarers Himalaya Adventures - Offers customizable trekking, rafting, wildlife, and culture trips to Nepal, Tibet, and Bhutan.
Whitewater Adventures - Offering rafting, canoeing, kayaking, hiking, and trail rides in the Canadian Rocky Mountains.
Wild Earth Adventures Hiking Club - Offers hikes and camping trips throughout the northeastern U.S. Led by founder-director Charles Cook.
Wild Forever Adventures - Guided backpacking trips for small groups in the Gila Wilderness of New Mexico, the red rock canyons of southern Utah, and the wilderness of Alaska's Gates of the Arctic.
Wild Wonderful Karnataka - Shares experiences and information resources for hiking, rock climbing, trekking, and nature walks in Karnataka. Offers lists of places, maps, and adventure organizations.
Wild-Wales - Offers outdoor weekends in Eryri (Snowdonia) that involve walking, hiking, and climbing the mountains with qualified and experienced guides.
Wilderness-Spirit Outfitters - Leads backpacking and mule-supported trips that include yoga, ecology, guitar, healing retreats, and cross-country trekking in California's Marble Mountain Wilderness and King Range/Lost Coast area.
Wildrift Adventures - Specializes in trekking in the Kumaon Himalayas offering jeep safaris, corporate training, and student camps.
Wonder Walks - Guided hiking and walking tours in the U.S. and Britain.
World Outside, The - Hiking, biking, and multi-sport adventure travel vacation outfitters offering tours worldwide.
Yama Adventures - Offering guided Himalayan treks in Ladakh, India.
Yokmok Adventures - Hiking tours and ski adventures in the Swiss, French, and Italian Alps. Yokmok offers professional guides for small groups, with self-guided tours as well.
Youghiogheny River Trail - Information and pictures from the trail stretching through the Laurel Mountains.
