Swed Asia Travel - Information on trekking and mountaineering, whitewater river rafting, sight seeing, and jungle safaris. - http://www.abodehimalaya.com/
Snow Leopard Trek Ltd. - Trekking options in popular and remote areas of the Himalayas. Also arranges trips for Tibet, Sikkim and Ladakh. - http://www.snowleopardtreks.biz
Sherpa Nippon Treks - Features a company profile and an overview of trekking and tour services. - http://www.sherpanippon.com/
Skyline Treks and Expeditions - Information on trekking, mountaineering, rafting, jungle safari, and other options in the Himalayas. - http://www.skylinetreks.com/
Sundar Himali Treks (P) Ltd - Offers treks and expeditions in Nepal. Contains a region-wise overview of tourist destinations. - http://www.south-asia.com/magicmountain
Sea and Sky Tours (P) Ltd - Contains information about the company and detailed tour itineraries and travel information. - http://www.seanskytours.com/
Sanctuary Treks - Features a profile, briefs on services, and a searchable travelling database along with daily news and photo gallery. - http://www.nepaltreksinfo.com/
See-Nepal (P ) Ltd - Includes listings of team members and information on the various trekking programs. - http://www.see-nepal.com/
Scenic Adventure - Holiday options and itineraries with information on service provider. - http://www.scenicadventure.com.np/
Sachin Adventures - Itineraries and description of trekking in the Himalayan region with a profile of the guide. - http://www.holidayinhimalayas.com/
Sherpa Shangri La Treks and Expeditions - Adventure treks, mountaineering, fixed deparure programs and other tours in the Himalayan region. - http://www.shangrilatrek.com/
Sunrise Trekking Pvt. Ltd - Provides trekking, climbing, sightseeing and outdoor adventures. Also offers air, bus and train ticketing service. - http://www.sunrisenepal.com/
South Asia Trekking (P) Ltd - Trekking and mountaineering information with other adventure activities. Navigable in English and French languages. - http://www.southasiatrek.com/
Sherpa Brothers Treks and Expeditions - Offers trekking, rafting, safaris and sight-seeing tours in the country and to Bhutan and Tibet. Contains information about the company and services offered. - http://www.sherpabrotherstreks.com/