North Sikkim Travel Guide: Lachung, Lachen, Yumthang Valley & Gurudongmar Lake

North Sikkim is what every Sikkim trip is built around. Two high-altitude valleys — Lachung and Lachen — give you access to four of the most photographed spots in the eastern Himalayas: the Yumthang Valley of Flowers, Zero Point at 4,724 m, Gurudongmar Lake at 5,154 m (one of the highest lakes in the world), and miles of remote alpine villages with traditional Sikkimese architecture. It is also the most logistically demanding part of any Sikkim trip — permits are mandatory, solo travel is impossible, and the weather can shut you out at the last minute. This guide is the practical version.

High-altitude alpine landscape

Part of our Sikkim cluster. Pair with the Sikkim overview, East Sikkim and West Sikkim guides.

Quick facts about North Sikkim

Region: North Sikkim
District: Mangan (post-2021 reorg)
Main villages: Lachung (2,750 m), Lachen (2,750 m)
Highest point on trip: Gurudongmar Lake, 5,154 m
Closest airport: Bagdogra (255 km from Lachung)
Closest railway: New Jalpaiguri (270 km)
Base for entry: Gangtok — all North Sikkim trips start here
Permit: Mandatory PAP (Indians) / RAP (foreigners) via registered operator
Recommended duration: 3 days / 2 nights
Best months: April – May, mid-Sept – early Nov

How North Sikkim works (read this first)

You cannot do North Sikkim independently. All trips are organised through Sikkim-registered tour operators who:

Process your Protected Area Permit (24–48 hr)
Provide an SUV with a registered driver
Book your camp or guesthouse in Lachung/Lachen
Arrange checkpoint clearances en route

A standard 3-day package costs ₹8,500–₹14,000 per person (sharing basis, sedan/Innova, 2 nights with meals).

Permits required for:

Lachung, Lachen, Yumthang Valley, Zero Point
Gurudongmar Lake
Naga waterfalls, Seven Sisters falls (en route stops)

How to reach North Sikkim

You'll go Gangtok → North Sikkim → back to Gangtok. There's no airport in North Sikkim itself.

From	Distance to Lachung	Drive
Gangtok	117 km	6 hr
Bagdogra	255 km	9 hr
NJP	280 km	9 hr 30 min

The route is Gangtok → Singtam → Mangan → Chungthang → Lachung. Chungthang is the split point — left to Lachen, right to Lachung.

The proven 3-day North Sikkim itinerary

Day 1 — Gangtok → Lachung (or Lachen)

8:00 AM Departure from Gangtok
Stops at Seven Sisters Falls, Naga Falls, Singhik viewpoint
Lunch at Mangan (3 hr in)
Arrive Lachung/Lachen 4–5 PM
Evening leisure / village walk
Dinner + early sleep (acclimatisation matters from here)

Day 2 — Day excursion (highest-point day)

Option A — Yumthang Valley + Zero Point (from Lachung)

6:00 AM Departure
Yumthang Valley of Flowers (3,564 m) by 7:30 AM — wildflowers from late March to early June
Zero Point (4,724 m) by 10:30 AM
Yumesamdong hot springs
Return Lachung by 2 PM
Afternoon rest, evening walk

Option B — Gurudongmar Lake (from Lachen)

4:00 AM Departure
Drive past Thangu and onto the 5,154 m Gurudongmar Lake
30 minutes at the lake — limited because of altitude
Return Lachen by 1 PM
Afternoon rest

Day 3 — Return to Gangtok

Slow morning, breakfast, last village walk
10:00 AM Drive back
Lunch at Mangan
Reach Gangtok by 4–5 PM

The "do everything" 4-day plan

If you want both Gurudongmar and Yumthang/Zero Point:

Day 1: Gangtok → Lachen
Day 2: Lachen → Gurudongmar → drive to Lachung
Day 3: Lachung → Yumthang → Zero Point → Lachung
Day 4: Lachung → Gangtok

This compresses two altitude days back-to-back. Acclimatise well; carry oxygen if available.

What to expect at each site

Yumthang Valley (3,564 m)

A wide, river-cut valley with rolling meadows. From late March to early June, the Singba Rhododendron Sanctuary blooms — 24 species of rhododendron in pinks, reds and yellows. Locals also call this "Valley of Flowers".

Zero Point (Yumesamdong, 4,724 m)

The end of the motorable road in this direction — beyond is a restricted border zone. Snowfields year-round. Cold, windy, breath-stealing. Limit time to 30–40 minutes.

Gurudongmar Lake (5,154 m)

A sacred lake bordering Tibet. Said to be blessed by Guru Padmasambhava — it doesn't fully freeze in winter (a small section remains liquid). Spend only 20–30 minutes here; the altitude is severe.

Lachung Monastery

A 19th-century Nyingma monastery overlooking Lachung village. The annual Cham dance in winter is a key cultural event.

Lachen Monastery

1858, also Nyingma. Less ornate than Lachung Monastery but in a beautiful pine-fringed setting.

When to visit North Sikkim

Season	Yumthang / Lachung	Gurudongmar / Lachen
March – early April	Rhododendrons starting	Often inaccessible (snow)
April – May (best)	Full bloom, busiest	Open, beautiful
June – mid-Sept	Monsoon — avoid	Avoid
mid-Sept – early Nov (best)	Crisp, golden valleys	Crystal clear, ideal
Nov – Feb	Many camps closed	Closed often (snow)

The single best window for both is mid-October to early November.

Acclimatisation matters

Gangtok is 1,650 m. Don't try to drive directly to Gurudongmar from Gangtok — that's a 3,500 m gain in one day.
Day 1 should land you in Lachen/Lachung at 2,750 m. Sleep low.
Day 2 takes you up to Zero Point or Gurudongmar and back to 2,750 m. Limit time at the top.
Watch for AMS symptoms: persistent headache, nausea, breathlessness at rest.
Avoid alcohol until after Day 3.
Diamox (Acetazolamide) can help — talk to your doctor.

Where to stay in North Sikkim

Lachung: Yarlam Resort, The Lachung Eyrie, Le Coxy Resort.
Lachen: Saraswati Royal Stay, Lachen Cottage, The Apple Orchard.
Permit-included packages: Most travellers use Gangtok-based operators who bundle stay + vehicle + permit.

Standard rooms are basic but warm — gas heaters, hot-water bags, generators for power.

Cost of a 3-day North Sikkim package (2026)

Travel style	Per person (3D2N, on twin-sharing)
Budget	₹8,500 – ₹11,000
Mid-range	₹12,000 – ₹16,000
Premium	₹18,000 – ₹24,000

Includes vehicle (Innova/Bolero), permits, stay, breakfast & dinner. Excludes lunches and tips.

What to pack for North Sikkim

Heavy down jacket + thermal base layer (mandatory)
Beanie, woollen gloves, woollen socks
Trekking shoes with grip (Zero Point is icy)
Sun hat + UV-blocking sunglasses
High-SPF sunscreen + lip balm
Camera + extra batteries (cold drains them fast)
Personal medication for 5 days
Cash (₹8,000–₹15,000) — no ATMs after Mangan
Photocopies of ID for permit checkpoints

Frequently asked questions

Can I visit North Sikkim without a tour operator?

No. All North Sikkim trips require a registered operator who arranges your PAP and vehicle. Solo travel isn't permitted.

How much does a 3-day North Sikkim trip cost?

₹8,500–₹16,000 per person on a sharing basis — includes vehicle, permit, breakfast & dinner, and 2 nights' stay.

What is the best time for Gurudongmar Lake?

Mid-April to early June and mid-September to early November. The road closes occasionally in deep winter.

Is Gurudongmar Lake worth the long drive?

Yes — if you're acclimatised. It is one of the highest accessible lakes in the world. The drive is challenging but unforgettable.

Can I do both Yumthang and Gurudongmar in one trip?

Yes — over 4 days. Day 1 to Lachen, Day 2 Gurudongmar then drive to Lachung, Day 3 Yumthang+Zero Point, Day 4 back to Gangtok.

Is altitude sickness common in North Sikkim?

Yes at Gurudongmar (5,154 m) and Zero Point (4,724 m). Most travellers experience mild symptoms; serious AMS is rare but possible. Take Diamox if your doctor approves, acclimatise, and limit time at the top.

Are foreigners allowed in North Sikkim?

Yes, with a RAP issued by the Sikkim Tourism Department through a registered operator. Some restricted areas (e.g. Cholamu Lake) are off-limits to foreigners.

Is there cell signal in Lachung and Lachen?

Limited. BSNL and Jio postpaid work in patches. No reliable signal at Gurudongmar or Zero Point.

Can I drive my own car to North Sikkim?

No. Vehicles must be registered with a Sikkim operator and cleared at the Mangan/Chungthang check posts.

Going to North Sikkim? Read this with the Sikkim overview to plan the full 7-day Sikkim trip, plus the East and West Sikkim guides for the legs around it.