Lachung or Lachen: Which Valley to Choose

Two valleys from one fork

At Chungthang, about 95 km north of Gangtok, two rivers meet to form the Teesta. The Lachung Chu comes in from the north-east and the Lachen Chu from the north-west, and each valley ends, for civilians, at a high point near the Tibetan border. Lachung, the small pass, leads to Yumthang Valley and Zero Point. Lachen, the big pass, leads to Thangu, Chopta Valley and Gurudongmar Lake. Both villages are Bhutia, both are governed by their Dzumsa councils under an elected Pipon, and both have a monastery: Lachen's from 1858, Lachung's from 1880.

The classic 3-day, 2-night tour from Gangtok does both: Lachen the first night, Gurudongmar at dawn, Lachung the second night, Yumthang the next morning, and back to Gangtok. But many people have only two days, travel with small children or older parents, or find one valley closed. Then the choice matters.

Side by side

This is how the two compare for a budget or mid-range traveller in 2025–26.

Choose Lachung if

Lachung is the easier, gentler choice, and the one we suggest for most first visits with only one or two nights. The village itself is pleasant to walk in: wooden houses with apple orchards, prayer flags along the river, Lachung Monastery above the village, and autumn colour in October and November. Yumthang is at 3,564 m, a climb most people handle well, and you choose on the morning whether to go higher to Zero Point.

Lachung also has more rooms at more price levels, so it is easier to book late, upgrade to a heated room, or add a night. Foreigners can usually visit with a Protected Area Permit. It is the better pick for families with young children, older parents, people with heart or lung conditions, anyone who wants rhododendrons in late April and May, and anyone who wants snow without going above 5,000 m.

Lachung is also the more forgiving choice when the weather turns. If fresh snow closes Zero Point, Yumthang is often still open, and if Yumthang closes, the village itself is worth a day. A Lachen night that ends with Gurudongmar closed leaves you with little to do but wait. For a short trip with one shot at good weather, that difference counts. Roads to both villages pass Chungthang, which has had repeated closures since 2023, so check current status before you travel.

Choose Lachen if

Lachen is for people who want Gurudongmar. The lake, at about 5,180 m on a bare plateau a few kilometres from Tibet, is one of the most striking places in the Indian Himalaya, and it is sacred to Buddhists, who link it to Guru Padmasambhava. The village is smaller, colder and less developed for tourism than Lachung, and its Dzumsa has been careful about growth. If you value quiet over comfort, that is a point in its favour.

Lachen suits healthy adults and older children, Indian citizens only for the lake, who are comfortable with a 3 am start and a short stay at very high altitude. Two nights in Lachen rather than one help a great deal with the altitude, and give you a chance to add Chopta Valley and to see the village monastery. Remember that the Lachen road has been the slowest to recover from the October 2023 flood; check current status before you travel.

Plan the Lachen night carefully. Eat an early dinner, skip alcohol, lay out warm clothes and a torch, and sleep by 8 pm. Rent boots and a long coat in Lachen the evening you arrive, not at 3 am. If anyone in the group is unwell in the night, tell the driver before the vehicle leaves; it is far easier to stay behind at the lodge than to turn a full jeep around on the plateau.

Village life beyond the day trip

Most visitors see each village only in the dark: arriving at dusk, eating, sleeping and leaving at dawn. That is a pity, because both are working mountain villages with their own rhythm, and an extra night shows you far more than another viewpoint.

In Lachung, walk down to the river flats and up through the orchards in the late afternoon. Apples ripen in September and October, and families sell them by the roadside. Climb to Lachung Monastery, founded in 1880, on the slope across the river; its yearly masked dance follows the Tibetan calendar. Notice the Dzumsa's rules in practice: the village has pushed hard against plastic, and you may be asked to carry your rubbish down. In October and November the larches and maples above the village turn gold and red.

Lachen is smaller and more compact. Its monastery, built in 1858, looks over the houses, and the village feels closer to its herding past, with families who still move yaks between summer and winter pastures toward Thangu. There are fewer shops and fewer cars, and in winter the place goes very quiet. Lachen's people have at times chosen to limit how fast tourism grows, which is part of what keeps the village as it is.

Whichever valley you choose, a second night lets you meet people in daylight, buy something from a village shop, and leave a little more money in households that rebuilt after the 2023 flood. It also gives you a buffer if a landslide closes the road for a morning.

• Lachung extras: orchard walks, the monastery, river flats, apple season in autumn, a soak at the Yumthang hot spring.
• Lachen extras: the monastery, Thangu and Chopta Valley on a spare day, quiet evenings, winter snow.

How to combine both

If both valleys are open and you have the days, doing both is the best use of the long drive from Gangtok. These are the patterns we suggest.

• 3 days, 2 nights: Lachen, Gurudongmar at dawn, then Lachung, Yumthang, back to Gangtok. The standard shared tour, about ₹6,000–8,000 per person.
• 4 days, 3 nights: as above but two nights in Lachung, so you see the village and do Zero Point without rushing.
• 5 days, 4 nights: two nights in Lachen for better acclimatisation and Chopta Valley, then two in Lachung. Best done with a reserved vehicle.
• Lachung only, 2 or 3 nights: for families, foreigners, or when the Lachen side is closed.

When one side is closed

Since the South Lhonak lake burst on the night of 3–4 October 2023 and the Teesta flood that followed destroyed the Teesta III dam at Chungthang, North Sikkim has rarely been fully open for long. The Chungthang crossing and the Lachen road have been the weakest links, with long closures and night-time restrictions, while Lachung has more often stayed open. Monsoon landslides in later years closed both valleys again for days.

So in practice the choice is often made for you. Decide your preference, but leave the final call until you are in Gangtok, ask two registered agents what is open that week, and read the Mangan district administration's notices. Keep a buffer day at the end of your trip. Check current status before you travel.