Toowoomba is built within a total water catchment area covering 56 square kilometres, featuring two main creeks – East and West Creeks – that meet just north of the CBD to form Gowrie Creek.
East Creek forms at the top of Middle Ridge, runs through Ballin Drive Park, the Waterbird Habitat and Garnet Lehmann Park.
It then flows downstream of Garnet Lehmann Park to form Lake Annand and then flows into the concrete-lined channel running parallel to Kitchener Street from Perth Street to Herries Street.
After running through a series of ponds, it cuts across the bottom corner of Queens Park, under Hume Street, and then flows in a narrow channel parallel to Chalk Drive. The creek passes under Ruthven Street where it meets West Creek to form Gowrie Creek.
The other arm, West Creek, starts at Kearneys Spring and runs down through a series of detention basins and continues into the city centre.
It runs through the City Golf Club, opposite Toowoomba Hospital, behind the PCYC down to Herries Street. It then runs parallel to Dent Street, behind the old library then under Margaret Street and then parallel to Victoria Street, under Russell Street where it meets East Creek to form Gowrie Creek.