Zemu Glacier in Sikkim: Gateway to Kanchenjunga
Zemu Glacier in Sikkim, deep in the remote corners of North Sikkim, is the biggest glacier of the Eastern Himalayas and a major doorway to the towering Mount Kanchenjunga, the world’s third-highest peak. Spanning about 26 kilometers, the glacier falls in the Kanchenjunga National Park, a UNESCO World Heritage Site famous for its high biodiversity and spectacular scenery. This frozen wonder not only nourishes the Teesta River but also entices seasoned trekkers, mountaineers, and scientists attracted to its raw, untamed beauty. While accessing Zemu Glacier demands special permits and a difficult trek, the trip is rewarded with spectacular vistas of alpine forests, high-altitude meadows, and Himalayan peaks, making it one of the most exciting and rewarding excursions in Sikkim.
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How to reach the Zemu glacier in Sikkim
1. By Air
The nearest airport to Zemu Glacier is Pakyong Airport, about 30 km from Gangtok. You can hire a taxi from the airport or take a local bus to reach Gangtok in approximately 1 to 1.5 hours. Alternatively, Bagdogra Airport (124 km from Gangtok) is well-connected to major cities, and from there, you can travel to Gangtok by taxi or shared jeep in 4 to 5 hours.
2. By Train
The closest railway station is New Jalpaiguri (NJP), about 120 km from Gangtok. From NJP, you can take a taxi or shared jeep to Gangtok, which takes approximately 4 to 5 hours. Once in Gangtok, you can continue by road to Lachen, the starting point of the trek to Zemu Glacier, about 107 km away.
3. By Road
Gangtok is well-connected by road to nearby cities like Siliguri and Darjeeling, with private taxis and state-run buses available. From Gangtok, take a taxi or shared jeep to Lachen (107 km), where the trek to Zemu Glacier begins.
Best time to visit in Zemu glacier in Sikkim

The best season for visiting Zemu Glacier in Sikkim is from April to June and September to November. In these periods, the weather is more comfortable, with clear blue skies and gentle temperatures, which facilitate the trek and make it easily accessible. The spring and early summer (April to June) provide a picturesque landscape of flowering rhododendrons and green meadows. September to November are good for experiencing crisp air and breathtaking scenery of the surrounding white peaks.
Travel Tips for Visiting Zemu Glacier in Sikkim
1. Get the Necessary Permits: Zemu Glacier lies within a restricted area, and you will need special permits from the Sikkim Tourism Department and the Forests and Wildlife Department.
2. Trekking Experience: The trek to Zemu Glacier is challenging, requiring physical fitness and endurance. Make sure you’re prepared for steep climbs, high altitudes, and long walking hours.
3. Respect the Environment: Zemu Glacier is in a protected area, so leave no trace. Carry all your waste with you, respect local wildlife, and follow the instructions of your trekking guide to preserve the pristine environment.
4. Hire a Guide: Due to the remote and challenging nature of the trek, it’s advisable to hire a local guide who knows the terrain, can help with permits, and ensure your safety during the journey.
5. Keep Safety in Mind: Trekking at high altitudes can be risky due to potential altitude sickness and changing weather conditions. Always listen to your guide and be aware of your limits.
Conclusion
The Zemu Glacier in Sikkim is a vital natural feature of Sikkim, both environmentally and scientifically. As a major source of the Teesta River and a key indicator of climate change in the Eastern Himalayas, it holds great ecological significance. Its remote and rugged location helps protect its pristine condition, making it a valuable site for ongoing research and conservation efforts.
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People also ask about the Zemu glacier in Sikkim
1. Is the Zemu Glacier trek difficult?
Yes, the trek to Zemu Glacier is moderately difficult and requires physical endurance. It is a high-altitude trek (above 4,000 meters) and can be challenging for beginners.
2. Do I need a permit to visit Zemu Glacier?
Yes, you need special permits to visit Zemu Glacier, as it is located in a protected area within Kanchenjunga National Park. These permits can be arranged through a certified trekking agency.
3. How long does it take to trek to Zemu Glacier?
The trek to Zemu Glacier typically takes about 8–9 days, including acclimatization and rest days. The trek involves walking through diverse terrains like dense forests, alpine meadows, and rocky paths.
4. What kind of wildlife can be seen near Zemu Glacier?
Zemu Glacier is located in a biodiverse region, and trekkers may encounter various wildlife species, including snow leopards, red pandas, wild boars, and numerous bird species.
5. What should I pack for the Zemu Glacier trek?
For the Zemu Glacier trek, pack warm clothing, good trekking boots, rain gear, sunscreen, first-aid kits, and high-altitude medication. It’s also important to bring enough food, water, and snacks for the long days of trekking.
6. Is there any trekking route to Zemu Glacier?
Yes, the Green Lake Trek is the most popular route, taking trekkers close to the Zemu Glacier and offering panoramic views of Mt. Kangchenjunga and surrounding peaks.