Dundas Valley is a Northern suburb of Sydney, in the state of New South Wales, Australia. Dundas Valley is located 21 kilometres north-west of the Sydney central business district in the local government area of the City of Parramatta.
The valley has been shaped by the Ponds Creek, around which many of the area's parks are located. The valley is bounded by both steep and gentle slopes feeding into the creek. The Ponds walk is a marked 6.6 kilometre track which follows the Ponds and Subiaco Creeks from Eric Mobbs Memorial Park in Carlingford to Jim Crowgey Reserve in Rydalmere. This walk follows a number of the parks in the Dundas Valley area.