The Barsey Rhododendron Sanctuary lies in the south west corner of the West Sikkim district. Spreading over 104 sq. km, across the razor sharp Singalila Range, which forms the natural international border with Nepal. There are three points of entry ino this sanctuary from Hilley, Dentam and Soreng. Tourists generally prefer Hilley since it is approachable by road. The bridle path from Hilley to Barsey is a favorite amongst tourists especially during the Rhododendron flowering season. The faunal value of Barsey Rhododendron Sanctuary includes Leopard cat , Himalayan Yellow Throated Marten , Himalayan Palm Civet, Himalayan Langur, Crimson Horned Pheasant, Monal Pheasant, Kaleej and many diverse species of birds.The Barsey Rhododendron Sanctuary spans over the razor sharp Singalila Range. The climate is wet and cold favoring the spread of the dominant genus Rhododendron. July is the wettest month, with the average annual precipitation being in excess of 250 cm. The reaches above 2500m receive regular snowfall in winter. Clear skies can be experienced only from November to May.A beautiful Tourist Trekker’s hut exists in Barsey, amidst the Rhododendron forests at 10,000 feet, commanding a glorious view of the Singalila Range. Boarding and Lodging facilities are available.