Munmurra River rises on the southern slopes of the Great Dividing Range, below Breeza Lookout, northeast of Cassilis and flows generally south by west, joined by four minor tributaries before reaching its confluence with the Goulburn River. The river descends 876 metres (2,874 ft) over its 74 kilometres (46 mi) course.[2]
South of the town of Cassilis, the Golden Highway crosses the Munmurra River.[2]