Gosaikunda Lake Trek & Janai Purnima Pilgrimage Guide

Gosaikunda (also spelled Gosainkunda or Gosāī̃kuṇḍa) is one of Nepal's most important high-altitude pilgrimage lakes and, increasingly, one of the most popular short treks near Kathmandu. It sits at roughly 4,380 metres in the rocky basin of the Langtang Himal, in Rasuwa district, entirely within Langtang National Park north-west of the capital. Its meltwater is traditionally counted among the sources of the Trishuli River.

The lake rewards two very different kinds of visitor. For pilgrims it is a Shaivite tirtha (sacred crossing-place) where a ritual bath washes away sin, most intensely on the full moon of Janai Purnima in August. For trekkers it is a fast, scenic route into genuine alpine terrain, doable in under a week, with tea houses the whole way and the option to loop on into the Langtang Valley or over the Lauribina Pass into Helambu.

Because the trek gains more than 2,400 m of altitude in a couple of days, it should be treated as a serious mountain undertaking rather than a casual weekend hike. This page focuses on the practical trek and pilgrimage; for the wider network of holy lakes and the meaning of the festival itself, see the site's dedicated sacred-lakes and Janai Purnima pages.

Gosaikunda's sanctity rests on the myth of the samudra manthan, the churning of the cosmic ocean. When the deadly halahala poison rose from the sea, Lord Shiva drank it to save creation; the venom turned his throat blue, earning him the name Neelkantha ('blue-throated one'). To cool his burning throat he struck the mountainside with his trident (trishul), and cold water gushed out to form the lake. A rock said to be visible near the centre of Gosaikunda is revered as the remains of a Shiva shrine, and devotees hold that Shiva rests in the lake during the Shrawan full moon.

Gosaikunda does not stand alone. Tradition counts 108 lakes scattered across the basin, 108 being a deeply auspicious number in Hindu and Buddhist cosmology, with named pools such as Saraswati Kunda, Bhairav Kunda, Surya Kunda and Ganesh Kunda nearby. The site is protected as the Gosaikunda and Associated Lakes Ramsar wetland, listed as a Wetland of International Importance in 2007 and covering about 1,030 hectares across at least 15 named lakes and ponds.

The reverence is shared across faiths. For Hindus the lakes are Shaivite waters tied to Shiva and the churning of the ocean; for the Tamang, Sherpa and other Buddhist communities of the region they are homes of nagas and protective deities within a landscape of gompas, mani walls and prayer flags. A widely held belief connects the lake directly to the Kathmandu Valley: the sacred tank at the Kumbheshwar temple in Patan is said to be fed by an underground channel from Gosaikunda, so a dip there on the same full moon is treated as equivalent to the high-mountain bath.

The lake's biggest day by far is Janai Purnima (जनै पूर्णिमा), the sacred-thread festival that falls on the full moon of Shrawan, usually in August. On that day tens of thousands of pilgrims climb from Dhunche and Syabrubesi over the steep trail to the freezing shore, joined by sadhus and by jhankri (shamans) who drum, dance and go into trance around the water. Bathing in the lake and changing the janai are believed to wash away sins and liberate ancestors.

For pilgrims the timing is fixed and non-negotiable, which is precisely what makes the festival trek risky: many ascend far too fast to meet the full-moon deadline, and cases of acute mountain sickness (and occasional deaths) are reported around Gosaikunda most years. The festival also falls at the tail of the monsoon, so trails are wet, leech-prone and landslide-prone, and the dawn bath adds a real hypothermia risk.

If you are trekking primarily for the mountains rather than the ritual, be aware that Janai Purnima brings enormous crowds, sold-out tea houses and a very different atmosphere from the quiet alpine trek of spring or autumn. Many trekkers deliberately avoid the full-moon week, while pilgrims and the culturally curious plan around it. This guide covers the trek year-round; for the festival's full meaning, the janai thread, the doro, kwati and the wider mela, see the Janai Purnima page.

The classic and most direct route starts at Dhunche (about 1,960 m), the Rasuwa district headquarters, roughly 100 km and a 3-4 hour drive from Kathmandu by private jeep (public buses take longer, around 7-8 hours). From Dhunche the trail climbs through forest via Deurali to Chandanbari, also called Sing Gompa (about 3,330 m), a small settlement with a Buddhist monastery and a well-known yak-cheese factory that serves as a three-way junction for Dhunche, Thulo Syabru and Lauribina.

From Chandanbari the path ascends past Cholangpati (Chyolangpati) to Lauribina (about 3,910 m), then into open alpine terrain, passing smaller sacred pools before reaching Gosaikunda itself at around 4,380 m. Most trekkers spend the night at the lake, take in the sunrise, and descend the way they came. A minimal itinerary is drive to Dhunche and walk to Chandanbari (day 1), Chandanbari to Gosaikunda (day 2), and return over one or two days, giving a 3-5 day trip in total.

An alternative approach begins at Syabrubesi (about 1,460 m, roughly 6-8 hours from Kathmandu), the standard gateway for the Langtang Valley, and climbs via Thulo Syabru to Chandanbari, which allows the trek to be combined with Langtang. From Gosaikunda, strong trekkers can continue over the Lauribina Pass (about 4,610 m, the high point of the whole route) and descend eastward through Phedi, Ghopte and Tharepati into the Helambu region, finishing at Melamchi or Sundarijal near Kathmandu, a longer loop of roughly 10-16 days when linked with Langtang.

The Gosaikunda trek is usually rated moderate to hard. The walking itself is not technical, but the trail is steep and the schedule short: reaching 4,380 m within two days of leaving Dhunche means gaining altitude fast, which is the single biggest hazard on the route. Acute mountain sickness (AMS) is common, and severe forms, high-altitude pulmonary and cerebral oedema, can be fatal.

The standard defences are the right ones here: ascend slowly, build in an extra acclimatisation night (Chandanbari is a good place to add one), stay hydrated, avoid alcohol, and never climb higher while feeling unwell. Learn the early symptoms of AMS (headache, nausea, dizziness, breathlessness at rest, poor sleep) and be willing to descend, which is the only reliable cure. Many trekkers carry acetazolamide (Diamox) as a preventive or treatment aid, ideally on medical advice.

Reasonable fitness makes the trek far more enjoyable but does not protect against altitude illness, which affects the fit and unfit alike. If you are pushing for the Janai Purnima full moon, resist the temptation to compress the schedule further; the fixed festival date is exactly when people ascend too fast. A guide is now legally required (see permits below) and adds a real safety margin on route-finding, weather and altitude judgement.

The best seasons for the Gosaikunda trek are autumn (late September to late November) and spring (March to May). Autumn brings crisp, clear air and the best mountain visibility, while spring adds rhododendron forests in bloom on the lower trail. In both windows the weather is relatively stable and the high pass is usually open.

Winter (December to February) is cold and often snowbound above Chandanbari; the lake frequently freezes and the Lauribina Pass can be blocked, so winter trekking is only for the well-equipped and experienced. The monsoon (June to August) brings heavy rain, cloud, leeches and landslide-prone trails, and views are frequently obscured.

The great exception is Janai Purnima, which falls squarely in the monsoon on the Shrawan full moon in August. For pilgrims that date is the entire point, so they accept the wet, difficult conditions for the sanctity of the day; for scenery-focused trekkers, spring and autumn are far more rewarding and much safer.

Two documents are standard for this trek: a Langtang National Park entry permit and a TIMS (Trekkers' Information Management System) card. Because Gosaikunda lies inside Langtang National Park, no separate permit is needed for the lake itself once you hold the park entry permit.

As of 2026, and always worth confirming with the Nepal Tourism Board or your agency before you travel, the Langtang National Park entry permit costs about NPR 3,000 for foreign nationals (inclusive of VAT) and NPR 1,500 for SAARC nationals, with a nominal fee for Nepali citizens. TIMS cards cost about NPR 2,000 for foreign independent trekkers, NPR 1,000 for foreigners trekking through a registered agency, and NPR 600 (agency: NPR 300) for SAARC nationals. Fees change periodically, so treat these figures as a guide only.

Note the major rule change: since 2023 Nepal has banned solo or fully independent trekking in national parks, so foreign trekkers must hire a licensed guide and go through a registered trekking agency. Permits are issued in Kathmandu (Nepal Tourism Board office) or, for the park entry, at the checkpoint in Dhunche; carry your passport, passport photos and enough cash, as there are no ATMs on the trail.

The route is a teahouse trek, so no tent or camp cook is needed. Basic lodges cluster at Dhunche, Thulo Syabru, Chandanbari (Sing Gompa, with roughly a dozen teahouses), Cholangpati, Lauribina and at Gosaikunda itself, where accommodation is simplest because of the remote, high setting. Expect twin-share rooms, shared bathrooms, blankets and limited electricity; rooms are cheap but food gets pricier and more limited as you climb. Book ahead or start early around Janai Purnima, when lodges fill fast.

Gosaikunda combines naturally with two longer trips. From Syabrubesi you can first trek the Langtang Valley to Kyanjin Gompa, then link across to Gosaikunda; or from the lake you can cross the Lauribina Pass and descend through Helambu to finish near Kathmandu. Both turn a short pilgrimage into a classic 10-16 day Himalayan circuit, but only for trekkers who are properly acclimatised and prepared for a high pass.

Pack for real cold and wet even in the trekking seasons: warm layers and a down jacket, a waterproof shell, a good sleeping bag (nights at the lake are freezing), sturdy broken-in boots, sun protection (hat, sunglasses, high-SPF sunscreen) and a headlamp. Bring a personal first-aid kit with altitude medication, water-purification tablets or a filter, and enough Nepali rupees in cash for the whole trek. Pilgrims bathing on Janai Purnima should add quick-dry clothing and a towel and be ready for near-freezing water at dawn.