It is almost 13000 ft above sea level. It is almost two and a half hours drive via road from Gangtok. It remains frozen all through out the year. Recently we visited Tsongmo Lake. The scenic beauty was splendid. The science was heavenly. Not mundane. Theres a Ropeway from which you can get a view of the whole lake and the mountains. You can also have a yak ride.at the cost of only rs 350. But if you want a pic on the top of the yak. It will only cost you rs 50. One of the best lake in the mountain valleys much higher above sea level. A must visit place for tourists visiting gangtok