Tonglu (3036 m above mean sea level) is one of the higher peaks of the Singalila Ridge and a small settlement inside the Singalila National Park in the Darjeeling subdivision, Darjeeling district in the state of West Bengal in India near the India - Nepal border.

[1] [2] [3]Sir Joseph Dalton Hooker carried out many plant hunting expeditions in Darjeeling and Sikkim.

[5] The map alongside shows the northern portion of the Darjeeling Himalayan hill region.

Kangchenjunga, which rises with an elevation of 8,586 metres (28,169 ft) is located further north of the area shown.

[6]Sandakphu, rising to a height of 3,636 metres (11,929 ft), on the Singalila Ridge, is the highest point in West Bengal.