The Kalamunda Zig Zag was a zig zag rail line that was part of the Upper Darling Range railway line in Western Australia, opening in July 1891 and closing in July 1949.

In 1952 the track was removed and most of the Kalamunda Zig Zag converted into a narrow bitumen road.

Part of this road is now a tourist drive called Zig Zag Scenic Drive, with the zig zag section that descends down the Darling Scarp being one-way in the direction of descent with a speed limit of 40 kilometres per hour (25 mph) and, as of May 2022[update], closed to motor vehicles between the hours of 8:30 pm and 11 am.

[2][3][4][5] This section of road was closed to motor vehicles completely by the City of Kalamunda in May 2020 due to reports of anti-social behaviour at night including hooning, drug use and cruelty to wildlife.

[7] In May 2022, City of Kalamunda councillors voted to keep the road open permanently with the night and early morning motor vehicle curfew to continue, despite concerns about the ongoing cost to do so.