The Bohorok River is a river of the Langkat Regency in North Sumatra province, Indonesia, about 1,400 km northwest of the capital Jakarta.

In October 2003, a large-scale flash flood in the Bohorok killed 242 persons.

[2] The river flows in the northern area of Sumatra with predominantly tropical rainforest climate (designated as Af in the Köppen-Geiger climate classification).

The warmest month is February, when the average temperature is around 24 °C, and the coldest is December, at 22 °C.

The wettest month is December, with an average of 352 mm rainfall, and the driest is June, with 125 mm rainfall.