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Cowan was a terminating point for CityRail suburban services until January 1992 when all services were curtailed at Berowra. A southbound passing loop is located immediately south of the station. In February 1999, it was extended south 1.1 kilometres (1 mi) to allow 1.5-kilometre (1 mi) freight trains to stable. North of the station the 8.6-kilometre (5 mi) Cowan Bank commences its descent to Hawkesbury River station and thereafter, crossing the Hawkesbury River.