The best places to visit in North Sikkim cluster across two valley systems — the Lachung side (which gives you Yumthang Valley, Zero Point, Shingba Rhododendron Sanctuary) and the Lachen side (Gurudongmar Lake, Cholamu Lake, Thangu, Chopta). All eight destinations below sit above 2,500 metres, all require the Protected Area Permit (PAP) processed through a registered tour operator, and almost all involve some altitude. Foreigners are currently excluded from Gurudongmar and Cholamu (Indians only). The standard 4-night North Sikkim circuit covers Yumthang, Zero Point, Gurudongmar, plus the village stops at Lachung and Lachen. Below is the ranked guide.
The Lachung side — open to foreigners
1. Yumthang Valley
Altitude 3,564 m. The "Valley of Flowers" of Sikkim — open meadow, river through the middle, snow on surrounding ridges, hot sulphur springs at the southern end. The April-June rhododendron bloom is the most-famous photograph (24+ species in the valley); the October primula bloom is the quieter alternative. PAP required. Drive from Lachung is 1.5 hours. Allow 3-4 hours at the valley including the hot spring walk and photographs.
2. Zero Point (Yume Samdong)
Altitude 4,720 m. The road-end before the Tibet plateau, 27 km above Yumthang. No vegetation, just snow ridges and high desert. First dusting of snow in mid-October, deep snow December-April (road sometimes closes). Drive from Lachung is 2.5 hours one-way. Stay 30-45 minutes at the road-end; bring oxygen if you are altitude-sensitive. The combined Yumthang + Zero Point day is the most-booked North Sikkim experience.
3. Lachung village
Altitude 2,750 m. A working Bhutia village of ~1,200 people on the right bank of the Lachung Chhu river. Your base for the Yumthang-Zero Point loop. Compact enough to walk end-to-end in 30 minutes. The 19th-century Lachung Monastery sits above the village; the apple orchards at the southern end are productive through late October. Stay overnight (or two) at one of the Bhutia-run lodges. PAP required.
4. Shingba Rhododendron Sanctuary
Altitude 3,000 m. Above Yumthang Valley, a 43 sq km sanctuary protecting 40+ rhododendron species. The bloom moves up through May from the valley floor into the sanctuary. Walking trails are well-marked from the valley road. Combine with Yumthang as a single morning visit — most travellers spend 1 hour here on top of the 2-3 hours at Yumthang.
The Lachen side — Indians only for the lake
5. Gurudongmar Lake
Altitude 5,430 m. One of the highest navigable lakes in India and a sacred site for both Buddhists and Sikhs. The lake colour at first light in October is what most guests come for. PAP required, Indians only — foreigners currently cannot visit. Dawn departure from Lachen (4:30 a.m.), army gate at Thangu opens 7 a.m., final barrier closes 10 a.m. Altitude is genuine — 12-15 per cent of guests feel symptoms; 4-6 per cent need to turn back. See our separate altitude post. Closed late December through February.
6. Lachen village
Altitude 2,750 m. The acclimatisation node for Gurudongmar. Quieter than Lachung, smaller, north-facing slope. Spring (April-May) and autumn (October-November) are the best windows for the village itself. The local gompa and the river path below the village are the quiet pleasures. PAP required.
7. Thangu and Chopta Valley
Thangu at 4,000 m sits on the road from Lachen to Gurudongmar — the army checkpost where the convoy timing decides whether you reach the lake on time. Chopta Valley near Thangu offers a high-altitude meadow walk in May-June when the alpine flowers bloom. Most Gurudongmar trips pass through Thangu without stopping; for travellers wanting an extra acclimatisation walk, an hour at Chopta is the recommended addition.
8. Cholamu Lake (rare access)
Altitude 5,330 m. The highest lake in India (slightly higher than Gurudongmar). 6 km from the Tibet border. Currently restricted to Indian nationals only and with special army clearance — not part of any standard tour. We have run two Cholamu trips in 14 years; the route requires advance army permission, an additional 2-hour drive past Gurudongmar, and acceptance that the visit may be cancelled day-of for any military reason. Mention only if you specifically want it.
How to combine these into a real trip
The standard 4-night North Sikkim circuit: Day 1 drive Gangtok → Lachung (6 hours). Day 2 Yumthang + Zero Point morning; afternoon drive to Lachen (4 hours). Day 3 dawn Gurudongmar; back to Gangtok by evening (long day). Day 4 buffer in Gangtok. This is the version we sell most often.
Shorter (3 nights): Skip Gurudongmar, do just the Lachung side — Day 1 Lachung, Day 2 Yumthang + Zero Point, Day 3 back to Gangtok. This is the foreigner version and the family-with-kids version.
Longer (5-6 nights): Add a second night at Lachen for a Chopta walk and slower Gurudongmar acclimatisation, plus a Dzongu (Lepcha reserve) extension on the way back. The Dzongu addition is gentle and gives a contrast to the high-altitude legs.
