Himalayan hill region Darjeeling Himalayan hill region is situated to the north of the state. This region belongs to the Eastern Himalaya range. The entire Darjeeling district (except the Siliguri subdivision and northern parts of Jalpaiguri and Alipurduar districts) falls under this zone, which starts abruptly from the Terai region. The deep gorges of Teesta River, which runs from north to south have divided this mountainous region into two parts: the western mountains (west of Teesta) and the eastern mountains (east of Teesta). The western mountains The western mountains are the higher part of Darjeeling Himalayan range, with an average height of . They spread from Nepal border to the Teesta river, and primarily consist of two mountain ranges: the Singalila Range and the Darjeeling range. The Singalila Range is located along the border of Darjeeling district and Nepal. It separates West Bengal from Nepal. Singalila starts from Western Sikkim and penetrates into Darjeeling district. It has four important peaks higher than 3,000 m: Sandakphu (3,636 m), Phalut (3,595 m), Sabargram (3,543 m), and Tonglu (3,036 m). Among the Himalayan ranges of this region, Singalila Range hosts Sandakphu (3,636 m), the highest peak in West Bengal. Kanchenjunga (the world's 3rd highest peak), Everest (world's highest peak), Lhotse (world's 4th highest peak), and Makalu (world's 5th highest peak) can be seen from the Singalila Range. The Darjeeling range rises steadily from Terai area. Located within this range, Ghum railway station (2,258 m) is the highest rail station in India. The famous Tiger Hill (2,567 m) is situated at the middle of this mountain chain and is a viewpoint from which some of the world's tallest peaks can be seen, including Kanchenjunga, Everest, Lhotse, and Makalu. Three minor mountain chains start from Tiger Hill: Darjeeling Lebong in the north, Takdah Peshok in the northeast, and Bagora Dowhill in the south. Sinchal (2,615 m) is one of the well-known peaks here. The eastern mountains The eastern side of the Darjeeling Himalayan mountains are lower than the western side, with an average altitude of . Durpin Dara and Chola are two major mountain chains of this part. The Durpin Dara chain holds the highest peak of eastern part: Rishila, at . There are two peaks, Renigango (1,885 m) and Chhoto Sinchula (1726m) to the north of Jalpaiguri district. The Buxa hill is located at the east end of this region. Sangchuli is the highest