Lasolo River is a river in Southeast Sulawesi province, Sulawesi island, Indonesia, about 1700 km northeast of the capital Jakarta.

[2][3] Tributaries include the Lalindu River.

The river flows in the southeast area of Sulawesi with predominantly tropical monsoon climate (designated as Am in the Köppen-Geiger climate classification).

The warmest month is October, when the average temperature is around 28 °C, and the coldest is June, at 24 °C.

The wettest month is July, with an average of 337 mm rainfall, and the driest is September, with 28 mm rainfall.