Spanning over an area of 905 sq. km with huge expanses of some of the last remaining stands of cool temperate broadleaved forests and old fir growth in the entire Himalayas. It falls within the boundaries of Bumthang, Mongar, Lhuentse and Zhemgang.
- Home to the Royal Bengal Tigers, Red Panda, Himalayan Black Bear, Common Leopard, Clouded Leopard, Musk Deer and Golden Cat.
- Sanctuary to bird species such as Rufous- necked Hornbill, Beautiful Nuthatch (Sitta formosa), Pallas’s Fish Eagle (Haliaeetus leucoryphus), Chestnut-breasted Partridge (Arborophila mandellii), Yellow-rumped Honeyguide (Indicator xanthonotus), Ward’s Tragon (Harpectes wardi), Tawny Fish Owl (Ketupa flavipes).
- Operationalized in 1998.