In 1890, when the British came to Mizoram, the Tlawng river was the main means of transportation from Silchar.

Sairang on the river banks of Tlawng, is the nearest town from Aizawl (about 14 kilometres away).

The Tlawng River is one of the longest rivers in Mizoram, measuring 234 km in length (Distance) or 185.50 km net displacement (a straight line) (as of 23.9.2015) Between Zobawk village near Lunglei Town to Bairabi (Mizoram Border) It originates in Zopui Hill (Near Zobawk) some 8 kilometres (5 mi) east of Lunglei at an elevation of 1,395 metres (4,577 ft).

After the confluence with Tut and Teirei River it eventually enters Cachar District.

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