After breakfast, in the morning, start for excursion to Tshangu Lake (12400Ft / 3780 Mts / 43Kms in 3Hrs one way from Gangtok) & through Kyongnosla Alpine Sanctuary and Baba Mandir (13100Ft / 3994 Mts / 16Kms in 1Hrs one way from Tshangu Lake) (no entry for foreigner national, they are allowed to visit till Tshangu Lake, with a valid permit. They also have to be 02 & above is number to visit Tshangu Lake). Situated at a height of 12400Ft / 3780 Mts / 43Kms in 3Hrs one way, with an average depth of 50 ft. The cool water of the Lake is perfectly attuned with the scenic beauty around. Back to Gangtok and Overnight at Hotel. (Incase of Landslide or due to any other reasons if Tshangu Lake is closed then an alternate sightseeing will be provided) .