TypeOtherDetailsMount Blanche is on the northern side of Marramarra Creek between Big Bay and Friendly Bay. It is shown as Mount Blanch on an 1831 survey map. CreatorPowell, John P. 1994, Placenames of the Greater Hawkesbury Region, Hawkesbury River Enterprises, Berowra, p.81.
Powell, John P. 1994, Placenames of the Greater Hawkesbury Region, Hawkesbury River Enterprises, Berowra, p.81., Mount Blanche. Hornsby Shire, accessed 26/04/2026, https://hornsbyshire.recollect.net.au/nodes/view/4348
