The approach to this sanctuary is from Gangtok which is 137 Km away. The sanctuary covers a total area of 43 sqaure Km.

The fauna seen in this park comprises of the Serow, Goral, Blood Pheasant , Common Hill Partridge etc. also found here. The beautiful and highly endangered Spotted Linsang or Tiger-Civet. Flora such as primulas, potentillas, gentians, saxifrages, poppies and aconites. Brown Trout were introduced into Yumthang Chhu at Phunyi.There is a Forest Rest House here, as well as one at Yumthang.

The best time to visit this place is March to May and October to December.