Whitewater Rafting & Kayaking Rivers of Nepal: Graded Directory

Nepal's rivers fall thousands of metres from the Himalaya to the Gangetic plain in a short horizontal distance, producing steep, high-volume whitewater that has made the country one of the world's premier rafting and kayaking destinations. Snowmelt and monsoon-fed rivers such as the Sun Koshi, Karnali and Tamur cut deep, road-free gorges, so a single trip can combine days of continuous rapids with remote wilderness camping on white sand beaches. Shorter runs like the Trishuli and Upper Seti sit within a few hours of Kathmandu and Pokhara, making rafting accessible to first-timers and domestic tourists as well as expedition paddlers.

Commercial rafting has operated in Nepal since the 1970s and is now regulated by the Government of Nepal. Companies must be licensed, and clients traditionally pay a river permit that authorises a trip on a specific river for a set number of days. The Nepal Tourism Board (NTB) promotes rafting as a headline adventure activity, the Department of Tourism handles licensing, and the Nepal Association of Rafting Agents (NARA), formed in 1989 (2046 Bikram Sambat), is the industry body that sets safety and guide-training standards. The Nepal River Conservation Trust (NRCT) campaigns to keep these rivers free-flowing and clean.

This directory grades each commercially run river on the International Scale of River Difficulty (Class I-VI) and lists the standard put-in and take-out, trip length in days and approximate kilometres, and the best rafting season. Grades below are indicative: on any Himalayan river the difficulty rises sharply with water volume, so the same rapid can be Class III at low water and Class IV-V in high flow just after the monsoon.

Rapids worldwide are rated on the International Scale of River Difficulty, a six-point system standardised by American Whitewater. The scale runs from Class I (easy) to Class VI (extreme and generally considered unrunnable). A plus or minus sign (for example IV- or III+) marks the upper or lower end of a grade, and Nepali operators often quote a range such as 'Class IV-V' because the grade shifts with the season's water level.

Understanding the grade is the single most important thing when choosing a river. Class II-III trips such as the Trishuli, Upper Seti and Lower Seti suit families, beginners and school groups. Class IV rivers such as the Kali Gandaki and Karnali demand fitness, the ability to follow commands and comfort with being flipped or swimming. Class V water on the Bhote Koshi, upper Marsyangdi and Tamur is expert terrain where a strong swim, prior experience and a well-drilled team are essential, and where clients raft only under experienced professional guides.

The Trishuli is Nepal's most popular and most accessible river, running alongside the Kathmandu-Pokhara-Chitwan highway. Standard trips are graded around Class II-III (rising toward Class III+ in high water) and run one to two days, with a common put-in near Charaudi or Baireni and take-outs downstream toward Kurintar, Mugling or Gaighat; longer versions continue to Narayanghat for Chitwan National Park. Because it is a three to four hour drive from Kathmandu, warm and forgiving, the Trishuli is the default choice for first-timers, day trips and domestic groups.

The Bhote Koshi, near the Tibet border about 3 hours (roughly 95 km) from Kathmandu, is the opposite: the steepest river commercially rafted in Nepal, with a gradient near 15 m per km and continuous, technical Class IV-V rapids (dropping to around Class III at low water). Trips run one to three days from a put-in near Baseri or the Borderlands/Last Resort area. It is the go-to short adrenaline run for confident and experienced rafters rather than beginners.

The Seti River offers a gentler multi-feature alternative. The Lower Seti near Damauli, between the Mugling-Pokhara road, is warm, clear and graded roughly Class II-III, typically run as a relaxed two-day family trip of about 30-35 km, putting in near Damauli and taking out toward Gaighat. The steeper Upper Seti near Pokhara is a shorter, punchier half-day to two-day option. Together the Seti runs are ideal for families, novices and anyone wanting scenery and wildlife over big whitewater.

The Kali Gandaki, sacred as the river of the god Gandaki and famous for its shaligram fossils, is the classic three-day whitewater trip from Pokhara. It is graded around Class IV, with continuous Class III water and standout Class IV rapids nicknamed 'Big Brother' and 'Little Brother'. The usual put-in is near Nayapul (about 70 km and 4 hours from Pokhara), covering roughly 60 km through a remote, temple-dotted gorge to a take-out near Mirmi/Modibeni. It packs serious whitewater into a short, road-accessible trip and is a favourite step up from the Trishuli.

The Marsyangdi, draining the Annapurna and Manaslu massifs, is one of Nepal's most demanding technical rivers. Rafting sections are graded Class IV+ to V, with a put-in reached by a short walk to Ngadi (Lamjung) and around 50 km of near-continuous, steep, boulder-strewn rapids run over about two days. It is strictly for fit, experienced rafters and is often cited as one of the world's best short whitewater rivers, though sections have been affected by hydropower development.

The Sun Koshi, the 'River of Gold', is Nepal's great multi-day journey, rated one of the world's top river trips. It runs about 270 km over 8-9 river days (trips typically 8-10 days) from Dolalghat, roughly 3 hours from Kathmandu, to Chatara in the eastern Terai, dropping from around 625 m to 105 m. The grade is around Class III-IV, building to Class IV-V rapids such as 'Harkapur' and 'Jaws' in the lower gorge, especially in higher water. With no roads or towns for much of its length, it is a true wilderness expedition of beaches, tributaries and remote villages.

The Karnali, in far-western Nepal, is the country's longest river and its premier wilderness raft, usually run as an 8-10 day trip that combines a trek or drive to the put-in near Dungeswar/Sauli with a big-volume float to a take-out toward Chisapani. Rapids range roughly Class III to V, with powerful, high-volume whitewater in a deep, biodiverse gorge on the edge of Bardiya National Park. Remote logistics and long access make it an expedition rather than a casual trip.

The Tamur, in eastern Nepal below Kanchenjunga, is a physically committing expedition famed for its density of rapids: around 120 rapids over roughly 120-130 km, graded Class IV-V. The classic trip begins with a multi-day trek in from Basantapur/Dobhan to reach the put-in, followed by four or more days on the water, for a total trip of about 10-13 days. Combined with the Sun Koshi (which it feeds), it is one of Nepal's most rewarding long whitewater adventures for seasoned rafters.

The main rafting seasons are autumn (mid-September to November) and spring (March to May), when flows are strong but manageable, the weather is dry and water is clearest; October-November is often the finest window. The monsoon (June-August) brings very high, brown, dangerous water that raises grades and closes many trips, while winter (December-February) offers low, cold but runnable levels on gentler rivers such as the Trishuli and Seti. High-water spring melt makes big rivers like the Karnali and Sun Koshi more powerful and technical.

Rafting is regulated by the Government of Nepal through the Department of Tourism, which licenses operators, while NARA sets professional standards. Foreign clients on many rivers pay a per-river, per-day permit, and trips through protected areas (for example the lower Trishuli/Narayani toward Chitwan, or the Karnali by Bardiya) may involve national park considerations. Always book through a government-licensed, NARA-affiliated company that provides certified guides, safety kayakers on harder runs, helmets, high-float lifejackets and a proper safety briefing.

Choose a river to match ability, not ambition. Beginners, families and children should stick to Class II-III (Trishuli, Seti); intermediate rafters can attempt Class IV (Kali Gandaki, Karnali); and only fit, experienced paddlers should take on Class IV-V water (Bhote Koshi, Marsyangdi, Tamur). Check the current water level with your operator before departure, as season and recent rainfall can push any Nepali river up a full grade.