source is in the Wombat State Forest on the northern aspect of Lerderderg and just south of Firth Park
it then flows to Lake Eppalock via Carlsruhe, Kyneton, Turpins Falls, Barfold, and Redesdale
the Coliban River (arises south of Lyonville) also feeds into Lake Eppalock via Trenthan Falls, Lauriston, Malmsbury, Taradale, Metcalfe
flow of the northern parts arises from outflow of Lake Eppalock
runs northwards through Elmore then to Aysons, then Rochester then to Echuca where it feeds into the Murray River
in the 2022 floods it formed a 10km wide flood zone around Rochester flooding most of the shops and houses