Bet Bet Creek in west Victoria starts below Ben Major, Victoria at an elevation of 479m and ends at an elevation of 165m flowing into the Loddon River at the Laanecoorie Reservoir. The Bet Bet Creek drops around 314m over its 87.8 km length and ultimately contributes to the Murray River system. The six creeks flowing into the Bet Bet Creek are: Moina Creek, Doctors Creek, Caralulup Creek, Timor Creek, Carmanuel Creek and the Burnt Creek.

The Loddon River, an inland river of the north–central catchment, part of the Murray-Darling basin, is located in the lower Riverina bioregion and Central Highlands and Loddon Mallee regions of the Australian state of Victoria. The headwaters of the Loddon River rise on the northern slopes of the Great Dividing Range east of Daylesford and descend to flow north into the Little Murray River, near Swan Hill. The river is impounded by the Cairn Curran and Laanecoorie reservoirs.