(This article is about the section of the Swan River in Western Australia. For the section of the River Thames, see River Thames.) Blackwall Reach (Jenalup in Noongar) is a section of the Swan River in Western Australia. It was named in the 1830s and referred to that part of the river, not just one side of the river or the other. In the twentieth century, the riverside land on the eastern bank that lies just south of Point Walter was specifically called Blackwall Reach. It contains limestone cliffs, and remnant vegetation adjacent to the river's edge.