Birchs Creek is a tributary of the Loddon River located in the southernmost part of the catchment. The creek rises in the ranges north-east of Ballarat and flows north-west through Newlyn and Smeaton before joining Tullaroop Creek near Clunes. The lower parts of the catchment are extensively cleared where the creek meanders through an incised basaltic valley. The creek contains a regionally significant platypus community and a vulnerable river blackfish population.
Birchs Creek is an important place for Traditional Owners and their Nations. The Registered Aboriginal Party (RAP) in the region is the Dja Dja Wurrung Clans Aboriginal Corporation. Representatives from the RAP were engaged during the preparation of the Birchs Creek seasonal watering proposal.