There are roads in the Himalaya that feel like ordinary mountain highways, and then there is the Old Silk Route of East Sikkim. Once a vital artery of trade between India and Tibet, this high road climbed from the river valleys through dense forests and into the open, windswept plateaus that sit close to the international border. Traders, mule caravans and later the British moved along these paths. Today the trade has stopped, but the road remains — and it is spectacular.
At the heart of the modern circuit sits Zuluk, a small Himalayan hamlet famous for one extraordinary stretch of engineering: thirty-two hairpin bends folded tightly into a short climb. From the viewpoints above, the road looks like a coiled serpent draped across the mountainside. Early mornings bring golden light on Kanchenjunga; afternoons can turn foggy or windswept; nights are cold, quiet and filled with stars.
This is not the crowded North Sikkim circuit of Lachen and Lachung. It is quieter, more intimate, and still carries the feeling of an old mountain highway — ideal for road-trip enthusiasts, photographers, couples seeking silence, families who want something different, and repeat visitors to Sikkim who have already done the popular routes.
Quick Overview
| Region | East Sikkim |
| Elevation of Zuluk | ~9,400–10,100 ft |
| Highest Point | Gnathang (Nathang) Valley — ~13,200–13,500 ft |
| Best Time to Visit | March–May & October–November |
| Ideal Duration | 3–4 days / 2–3 nights |
| Permit | Protected Area Permit (PAP) — Indian nationals only |
| Nearest Airport / Rail | Bagdogra (IXB) / New Jalpaiguri (NJP) |
| Suitable For | Offbeat travellers, road-trippers, photographers, couples, nature lovers, careful families |
What Is the Old Silk Route?
The Old Silk Route in East Sikkim was part of a larger network of mountain paths connecting the plains of Bengal and the hills of Sikkim with the Tibetan plateau. Silk, salt, wool and tea moved both ways, carried by traders and mule trains through high passes such as Jelep La. The British surveyed and improved it for military and administrative movement; after the border with Tibet closed, the commercial traffic largely stopped.
What remains is a scenic high-altitude road, maintained largely by the Border Roads Organisation. The modern tourist circuit follows the historic alignment from the lower valleys around Rongli up through Padamchen, Lingtam and Zuluk, then climbs to the open grasslands of Gnathang Valley and the high points near Kupup. Strong army presence, frequent check-posts and the sense of being on a border road never quite leave you — and that mix of history, dramatic engineering and raw landscape is what makes it special.
Why Travellers Love Zuluk
32 Hairpin Bends
The most photographed feature of the circuit — the road folds back on itself thirty-two times, best seen whole from Thambi View Point.
Kanchenjunga Views
On clear mornings the eastern face of Kanchenjunga lights up in gold and pink from Thambi and Lungthung.
Sunrise Spectacle
Early starts are rewarded with mountain light, the zigzag below, and warming high peaks — one of East Sikkim’s finest sunrises.
Offbeat & Quiet
Restricted access keeps numbers low. You meet fewer groups and more independent travellers and photographers.
Village Hospitality
Homestays dominate — local families, simple meals, genuine conversation and a warm welcome.
Photography Variety
Tight hairpin compositions, wide panoramas, misty forests, high grasslands and winter snow — all in a short distance.
Major Stops on the Silk Route
Rongli
The practical entry and permit-processing centre — a working bazaar town marking the start of the restricted zone.
Lingtam & Padamchen
Quieter forested village stretches with good views and homestays — ideal for a night’s acclimatisation before climbing higher.
Zuluk
The main base — prayer flags, a modest monastery and a growing cluster of homestays. The famous zigzag begins just above the village.
Thambi View Point (~11,200 ft)
The classic sunrise spot, combining the Kanchenjunga panorama with the dramatic view of the 32 bends. Arrive before first light.
Lungthung
Higher and more open than Thambi, with stronger mountain views and a greater sense of space. Windy, cold and superb for photography.
Gnathang Valley (~13,300 ft)
The ‘Ladakh of East Sikkim’ — wide high grasslands, green or golden in summer and white in winter, with war memorials and a strong army presence.
Tukla Valley
A historic stretch with a British-era war memorial and open mountain landscapes — a quiet stop for those drawn to the region’s military history.
Kupup & Elephant Lake
The distinctive Elephant Lake (shaped like an elephant from certain angles), high open scenery, and — surprisingly — the world’s highest golf course nearby.
Baba Mandir
The army-maintained shrine to Baba Harbhajan Singh — a place of quiet respect with sweeping views.
Tsomgo Lake
The well-known glacial lake, combinable with the circuit when permits and timing allow — beautiful when partly frozen or under clear skies.
Suggested Itineraries
2 Days — The Quick Circuit
Day 1: NJP / Bagdogra or Gangtok → Rongli (permits) → Zuluk; overnight in Zuluk.
Day 2: Pre-dawn to Thambi for sunrise, on to Lungthung and Gnathang Valley, then return or drop towards Gangtok / NJP.
Tight but possible — best for travellers already in Gangtok.
3 Days — The Balanced Trip
Day 1: Arrival to Padamchen or Zuluk via Rongli.
Day 2: Full day — Thambi sunrise, Lungthung, Gnathang Valley, and Kupup & Baba Mandir if time allows; overnight in Zuluk or higher.
Day 3: Descend to NJP / Bagdogra or Gangtok.
4–5 Days — The Relaxed Explorer
4 days: Adds a night in Aritar or Padamchen for better acclimatisation, plus extra time for photography and village walks — ideal for families and photographers.
5 days: A fuller loop with more time in Gnathang, a possible connection towards Tsomgo, and slower travel — for combining the Silk Route with other East Sikkim experiences without rushing.
Best Time to Visit
- Spring (Mar–May): rhododendrons on lower slopes, milder temperatures, often-clear skies and residual snow up high — good all-round conditions with moderate crowds.
- Summer (May–Jun): pleasant at mid-elevations, cool higher up, generally good early-season visibility; late June brings the first monsoon hints.
- Monsoon (Jul–Sep): heavy rain, frequent landslides, poor visibility and closure risk — most operators advise against the full high circuit.
- Autumn (Oct–Nov): one of the best windows — clear skies, crisp air, excellent views and reliable roads. Ideal for sunrise photography.
- Winter (Dec–Feb): snow transforms the zigzag and Gnathang, magical on clear days — but with closures, sharp cold and a need for 4WD and experienced drivers. For the well-prepared only.
Sunrise at Thambi View Point
Thambi is famous for good reason. On a clear morning the first light hits Kanchenjunga while the zigzag road below is still in shadow or just beginning to catch the glow — a rare combination of mountain light and engineered drama. Leave Zuluk well before dawn so you are in position as the sky lightens. Weather decides everything: cloud or fog can erase the view entirely. Carry a torch, warm clothes and a camera with spare batteries, and expect cold, wind and a short window of perfect light. When it works, it is one of the finest sunrises in East Sikkim.
Stays, Food & Budget
Where to stay
Homestays are the dominant and most rewarding option — simple rooms, home-cooked meals and genuine hospitality, though facilities are basic (bucket hot water, limited heating, intermittent power). Budget hotels exist in Zuluk and lower villages; family-friendly larger homestays can arrange adjoining rooms; premium comfort is limited on the higher sections (better around Aritar or Gangtok).
What to eat
Momos and thukpa appear at almost every meal, butter tea is traditional, and homestay dinners bring rice, dal, seasonal vegetables and occasional pork or chicken in local style — comforting food that warms you after long, cold drives.
Budget guide
Per person, twin-sharing, excluding flights:
Budget: ₹5,000–9,000 (2–3 days) — shared transport, basic homestays with meals, permits.
Mid-range: ₹10,000–16,000 — better homestays/lodges, more comfortable vehicle, flexible pacing.
Premium: ₹20,000+ — private vehicle, higher-end stays where available, extra time and winter/photography support.
Transport and permits form a big share because of restricted vehicle rules and long distances.
Photography & Family Notes
Photography: sunrise at Thambi and Lungthung gives the classic mountain-light-plus-zigzag frame; the bends are best shot from the higher viewpoints; Gnathang opens into wide panoramas; villages offer quieter human-scale frames; winter snow is high-contrast but hard on gear. Drone use is heavily restricted or prohibited in this border area — do not assume it is allowed. Carry spare batteries, a polariser and weather protection.
Families: the lower and mid sections work well with an overnight in Padamchen or Zuluk for acclimatisation; monitor altitude carefully at Gnathang. Seniors should consult a doctor and limit time at the highest points. Medical facilities are basic beyond Rongli, network is patchy to absent, and the strong army presence keeps the area safe — but experienced drivers and sensible pacing matter. Pack familiar snacks, motion-sickness tablets and extra warm layers.
Travel Tips from Local Experts
- Book only through a registered operator for permits and authorised vehicles.
- Carry original Voter ID or Passport; keep multiple photocopies.
- Start every major day early — weather windows are short.
- Spend a night at mid-altitude (Padamchen or Zuluk) before pushing higher.
- Dress in layers; stay hydrated and avoid alcohol at altitude.
- Keep sufficient cash — ATMs are scarce — and download offline maps.
- Pack motion-sickness tablets for the hairpins.
- Follow all check-post and army instructions without argument.
- Confirm road and weather status the evening before; avoid night driving up high.
- Carry a torch for pre-dawn starts and a power bank for the cold.
- Protect camera gear from cold and dust; never photograph restricted installations.
- Choose experienced local drivers who know the route.
- Do not litter, respect the quiet of the higher villages, and leave the place better than you found it.
- Be flexible — fog and snow can change plans.
- Enjoy the silence — it is one of the route’s greatest gifts.
Common Mistakes to Avoid
- Arriving without proper photo ID and photocopies.
- Trying to do the whole high circuit with no intermediate overnight.
- Underestimating the cold, even in spring and autumn.
- Expecting luxury facilities on the higher sections.
- Ignoring weather forecasts and road status.
- Setting off for Thambi sunrise too late.
- Assuming mobile network will work, or that self-drive is allowed.
- Visiting in peak monsoon without contingency plans.
- Staying too long at the highest points if symptoms appear.
- Treating the route as a casual day trip rather than a high-altitude journey.
- Leaving trash at viewpoints.
Frequently Asked Questions
What is the altitude of Zuluk, and how many hairpin bends are there?
Do I need a permit, and who can get it?
Where is the permit processed, and what documents are needed?
Does Zuluk get snow, and is the road open in winter?
Are there hotels in Zuluk?
Can I self-drive, and how long is the journey?
Is it suitable for children and seniors?
What is the best sunrise spot, and can I use a drone?
What is the best overall season?
Can I combine it with Tsomgo Lake, and is there network?
Is it expensive, and are meals included?
Ready for the Old Silk Route?
Go with realistic expectations about facilities, respect the altitude and the rules, and start early for the light — and the zigzag road under morning sun, the open space of Gnathang and the quiet of a Himalayan homestay night will stay with you for a long time. Tell us your dates and we’ll handle the permits, the authorised vehicle and the stays.
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