Tsomgo Lake and Nathu La day trip planner

You need a Protected Area Permit for Tsomgo, Baba Mandir and Nathu La, and you cannot apply for it yourself. A registered Gangtok travel agent or your hotel's agent files it with one photo ID copy and two passport photos per person. Hand these over the evening before for Tsomgo, and a day ahead, often by early afternoon, for Nathu La.

Nathu La is open only to Indian citizens, and as we understand it only Wednesday to Sunday; it is closed to tourists on Monday and Tuesday. Operators usually will not take children under 5 to Nathu La. Foreign nationals can visit Tsomgo Lake on a day permit through an agent, usually in a group of at least two, but cannot go on to Nathu La. Snow, landslides or security alerts can close the pass on any day. Check current status before you travel, and see our permits guide for the full rules.

Only Gangtok-registered tourist vehicles with the right papers can run this route, so a car hired in Siliguri cannot take you. Most trips use a Bolero, Scorpio, Xylo or similar, carrying up to about five passengers. Book through your hotel or a registered agent, and confirm in writing what is included: permit, waiting time and all stops.

Our indicative 2026 ranges are below. In 2024 the Sikkim government published fixed and maximum fares for these packages by vehicle class, after complaints of overcharging; ask your agent to show you the current chart, and check current status before you travel.

• Whole car, Tsomgo and Baba Mandir: ₹4,500–6,500 per vehicle.
• Whole car, Tsomgo, Baba Mandir and Nathu La: ₹6,500–9,000 per vehicle.
• Shared seat on a Tsomgo tour: ₹800–1,300 per person.
• Nathu La permit: around ₹200 per person, often included in the car price.
• Coat and boot hire at the roadside shops: ₹100–300 per item.
• Yak ride or photo at Tsomgo: ₹300–600.
• Tea, Maggi noodles and momos at the lake stalls: ₹30–150 per item.

The biggest risk on this trip is not the road; it is the height. You climb more than 2,600 m in about three hours and spend time above 4,000 m with no chance to acclimatise. Most healthy adults feel only a mild headache or breathlessness, but some feel worse, and acute mountain sickness can begin above 3,000 m.

Do not do this trip on your first day in Sikkim. Spend at least one night in Gangtok first. Eat a light breakfast, drink water through the day, and skip alcohol the night before. At Nathu La, walk slowly, avoid running up the steps for photos, and keep your time on top short.

Turn back and go down if anyone has a severe headache, vomiting, confusion, unusual sleepiness or difficulty breathing at rest. Going down is the cure. People with heart or lung disease, pregnant travellers and anyone with a recent illness should ask a doctor before going above 4,000 m. Operators usually will not take children under 5 to Nathu La, and very young children are better off at the lake only.

It can be pleasant in Gangtok and below freezing at Nathu La on the same morning. Dress in layers you can add and remove in the car.

Roadside shops before the lake rent knee-length coats and gumboots. Hire boots only if there is snow or slush on the ground, usually from December to March. In April, May, October and November, warm clothes from home are usually enough; in July and August, a rain layer matters more than a heavy coat.

• Thermal top, fleece or sweater, and a windproof or down jacket.
• Warm cap, gloves and a scarf or buff; the wind at the pass is the coldest part.
• Trousers you can move in, and thick socks.
• Closed shoes with good grip; boots with snow on the ground.
• Sunglasses and sunscreen; the sun at 4,000 m burns quickly, especially on snow.
• Water, a few snacks, lip balm and any medicines you use.

Tsomgo Lake, also called Changu, lies at 3,753 m, about 40 km from Gangtok, in a bowl of steep slopes inside the Kyongnosla Alpine Sanctuary, an area of about 31 km² known for rhododendrons, junipers and silver fir. The lake usually freezes in mid-winter and is ringed with flowering rhododendrons in May. Mornings give the clearest water and sky; by midday cloud often rolls in. Yaks wait by the shore for rides and photos.

Baba Harbhajan Singh Mandir honours a soldier of the Punjab Regiment who died near Nathu La on 4 October 1968; the army's account says he fell into a stream while escorting a mule column. Soldiers' legend holds that his spirit still guards the border and warns troops in dreams, and that his belongings were sent home by train each year. Tell this as the legend it is; the shrine is cared for by the army, and visitors leave water bottles to be blessed.

Nathu La, at 4,310 m, is a pass on the border with Tibet, and Indian and Chinese posts stand very close together here. It has a long history: surveyed by J. W. Edgar in 1873, used by the Younghusband expedition of 1903–04, sealed after the 1962 war, and scene of deadly clashes in 1967 that are remembered at the Sherathang memorial below. Border trade reopened through Nathu La in 2006. Follow army instructions on where you may walk and photograph; rules are strict and change without notice.

April, May, October and November give the best mix of open roads, clear mornings and manageable cold. May adds rhododendrons; October and November usually bring the clearest skies. From December to March you may see the lake frozen and snow on the road, but Nathu La closes more often and some days the road is shut beyond the lake. In monsoon, from June to September, the road is usually open to Tsomgo but slides and cloud are common, and Nathu La is less reliable.

Whatever the month, leave early. Clear views come before 10 am, permit queues are shorter, and you will be back in Gangtok before the afternoon cloud and traffic. Check current status before you travel, as road and pass openings change daily.