The Kolan River is a river located in the Bundaberg Region, Queensland, Australia. The river rises in the Bobby Range, below the Dawes Range in the north-east, and the Burnett Range in the south-west. The river flows generally south and then east towards the settlement of Toweran where the Bruce Highway crosses the river. From this point the river flows south by east and enters Lake Monduran, formed in 1978 by the damming of the river in order to mitigate severe flooding in the river's lower reaches. The river then flows east and then finally north by east and reaches its mouth north of Moore Park. The Kolan River is joined by nineteen tributaries including the main tributary, Gin-Gin Creek, a watercourse that is 92 kilometres (57 mi) long. The lower reaches of the river are surrounded by