Complex sentence: The Canning River Regional Park is one of eight Regional Parks within the Perth metropolitan area and is the largest Regional park which surrounds approximately 6 km of the Canning River between Nicholson Rd and Shelley Bridge (Leach Hwy).
Split into simpler sentences: The Canning River Regional Park is the largest of eight Regional Parks within the Perth metropolitan area. The park covers approximately 6 km of the Canning River between Nicholson Rd and Shelley Bridge (Leach Hwy).