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Sikkim packs an astonishing amount into India's second-smallest state: a clean, walkable capital, glacial lakes at 12,000-plus feet, a road pass on the old Silk Route, and valleys that turn into carpets of rhododendron every spring. Towering over all of it is Kanchenjunga, the world's third-highest peak, which shows up on the horizon from half the viewpoints in the state.
What trips up first-time visitors is not the altitude but the logistics. Large parts of Sikkim sit near the China border and need permits, most high-altitude excursions run only through registered local operators, and the weather decides more of your itinerary than you do. This guide covers what actually matters: what to see, which permits you need, when to go, and how a typical 5 to 7 day circuit fits together.
Gangtok: your base for everything
Almost every Sikkim itinerary starts in Gangtok, about 4 to 5 hours by road from Bagdogra airport or New Jalpaiguri railway station. The heart of the city is MG Marg, a pedestrian-only boulevard lined with cafes, bakeries and souvenir shops where locals stroll every evening; it is litter-free, vehicle-free and genuinely pleasant, which sets the tone for the whole state.
Give Gangtok a full day. Ride the Damovar ropeway cable car for a view across the whole ridge-hugging city, visit the Namgyal Institute of Tibetology, and drive out to Rumtek Monastery, about an hour away. Rumtek is one of the most important seats of Tibetan Buddhism outside Tibet, and the drive itself, through terraced hillsides, is half the experience. Other easy add-ons are Enchey Monastery, the Flower Exhibition Centre and Tashi Viewpoint for an early-morning Kanchenjunga sighting.
Tsomgo Lake, Baba Mandir and Nathu La
The classic day trip from Gangtok climbs the old Silk Route towards the China border. First stop is Tsomgo Lake (also spelt Changu), a glacial lake at roughly 12,300 ft that freezes over in winter and reflects the surrounding peaks the rest of the year. Yak rides and tea stalls line the shore. Further up is Baba Harbhajan Singh Mandir, a shrine to an Indian Army soldier that soldiers and travellers alike treat with deep respect.
The road ends at Nathu La, the mountain pass on the India-China border at over 14,000 ft, where you can see the border fencing and interact with army personnel. Permits are non-negotiable here: even Indian citizens need a Protected Area Permit for Nathu La, arranged only through registered travel agents in Gangtok, typically a day in advance with passport-size photos and ID proof. Tsomgo Lake and Baba Mandir also require a permit, though it is easier to obtain. Nathu La is open to visitors only on certain days of the week and closes at short notice for weather or security reasons, so treat the exact rules as changeable and confirm with your operator before you travel. Foreign nationals are not permitted at Nathu La at all as of 2026.
Good to know: Carry original photo ID and two passport photos to Gangtok for permits. Book the Nathu La excursion on your first evening so the agent has time to process it.
North Sikkim: Lachen, Lachung and the big two
North Sikkim is the most dramatic part of the state and the least DIY-friendly. The circuit runs as a 2-night, 3-day loop from Gangtok in shared or private SUVs arranged by registered operators, with special permits included in the package; you cannot simply drive up on your own. Night one is usually in Lachen, a small village that serves as the base for Gurudongmar Lake, a sacred high-altitude lake at around 17,800 ft near the Tibetan plateau. The pre-dawn drive up is cold and rough, but the sight of the turquoise lake against bare brown mountains is the single most memorable image most travellers take home from Sikkim.
From Lachen the circuit crosses to Lachung for the second night, and the next morning heads into Yumthang Valley, the Valley of Flowers of Sikkim, at about 11,800 ft. In April and May the valley blazes with rhododendrons; the rest of the season it is grazing yaks, a rushing river and hot springs. Roads in the north are genuinely tough, landslides cause delays in the monsoon, and children below a certain age and travellers with heart or breathing conditions are often advised against Gurudongmar because of the altitude. Shared cabs keep costs down but fix the schedule; a private vehicle costs more and buys flexibility.
- Gurudongmar sits at ~17,800 ft; ascend only after a night in Lachen and skip it if you feel unwell
- Permits for North Sikkim are arranged by your operator; carry ID and photos
- ATMs and mobile network are unreliable beyond Gangtok; carry cash
- Petrol pumps are scarce in the north; operators plan fuel, but long delays happen
When to go: two clear windows
Sikkim has two distinct high seasons. March to June is spring and early summer: rhododendrons and primulas bloom across Yumthang and the higher ridges, days are mild, and all routes are generally open. This is the best window for flowers and comfortable sightseeing, though haze can soften the mountain views by late morning.
October to December is the season for mountain clarity. Post-monsoon skies are washed clean, and Kanchenjunga stands sharp on the horizon almost every morning; this is when photographers come. December gets seriously cold at altitude and Tsomgo begins to freeze, which is an attraction in itself. Avoid July to September if you can: monsoon landslides regularly cut the North Sikkim road and can strand travellers for a day or more. January and February bring heavy snow that closes Nathu La and often the north entirely.
Good to know: For guaranteed Kanchenjunga views, keep your Gangtok and Pelling mornings free before 8 am in October or November. Clouds build up by mid-morning even in season.
Altitude, health and packing
Gangtok itself, at around 5,500 ft, troubles nobody. The day trips are where altitude matters: Tsomgo and Nathu La take you above 12,000 ft within a couple of hours of leaving the city, and Gurudongmar is high enough that even fit travellers feel breathless. Sleep a night or two in Gangtok before the Nathu La trip, do the North Sikkim circuit after (not before) you have acclimatised, drink plenty of water and go easy on alcohol. Anyone with cardiac or respiratory conditions should consult a doctor before committing to Gurudongmar.
Pack in layers whatever the month: a warm jacket, gloves and a cap are needed at the high points even in May. Sturdy shoes, sunscreen and sunglasses matter more than people expect, because high-altitude sun is harsh. Woollens can also be rented near Tsomgo if you are caught short.
How Sikkim packages are typically structured
Most operators sell Sikkim as a 5 to 7 day circuit out of Bagdogra or NJP. A typical 5-day plan is: arrival and transfer to Gangtok, a Gangtok local sightseeing day, the Tsomgo-Baba Mandir day trip (Nathu La as an add-on, subject to permits), and the 2-night North Sikkim loop before returning. Seven-day versions add Pelling and its skywalk in West Sikkim, or a night in Lachung with more time in Yumthang and the higher Zero Point excursion.
As of 2026, expect roughly Rs 15,000 to Rs 25,000 per person for a standard 5 to 6 day package covering hotels, shared transport, permits and breakfasts and dinners, with the Nathu La add-on and private vehicles pushing it higher; peak-season and premium-hotel packages go well beyond that. Prices move with fuel costs and season, so treat these as ballpark figures and compare current quotes. The real value of a package in Sikkim is not the hotel bookings, it is the permit handling and a driver who knows which roads are open that morning.
