A fragile road etches its way up the Teesta Valley and splits at Chungthang with one branch bearing northwest to Lachen and beyond, the other due north to Lachung, to the beautiful valley of Yumthang and eventually Zero Point on the high plateau.

The huge earthquake of 2011, with its epicentre near the capital Mangan, severed the roads to North Sikkim and left over sixty people dead. Then, a year later, unexpected late-season rains caused deadly landslides that once again isolated the region for several weeks. Travellers to North Sikkim need to show their permits at Tong, from where the stretch of road to Chungthang has greatly improved in recent times.

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