McCarrs Creek, New South Wales is at the headwaters of a semi–mature tide located about how far  north of the Sydney central business district
McCarrs Creek, New South Wales: McCarrs Creek is a suburb that is located adjacent to McCarrs Creek, approximately 4 km west of Newport, at the headwaters of the Pittwater in northern Sydney, in the state of New South Wales, Australia. Pittwater: Pittwater is a semi–mature tide dominated drowned valley estuary, located about 40 km north of the Sydney central business district, New South Wales, Australia; being one of the bodies of water that separate greater Metropolitan Sydney from the Central Coast.
40 km