Nepean Gorge

{{Use dmy dates|date=March 2025}}

{{Use Australian English|date=July 2014}}

The Nepean Gorge is a gorge on the Nepean River west of Sydney, New South Wales, Australia.{{Cite web |title=Nepean Gorge |url=https://penrithcity.spydus.com/cgi-bin/spydus.exe/ENQ/WPAC/ARCENQ?SETLVL=&RNI=510465 |access-date=2024-07-17 |website=Penrith City Library |language=en}}

The gorge is located south of the western suburb of Penrith{{Cite web |title=Nepean Gorge, Nepean River |url=https://penrithcity.spydus.com/cgi-bin/spydus.exe/ENQ/WPAC/ARCENQ?SETLVL=&RNI=308582 |access-date=2024-07-17 |website=Penrith City Library |language=en}} and is administered and protected by the NSW National Parks & Wildlife Service. It is carved through the sandstone typical of the region, Hawkesbury sandstone. There is some speculation{{citation needed|date=February 2013}} as to why it runs through the eastern edge of the Blue Mountains rather than around it.

The gorge is popular for water recreation by small watercraft all year. Lookouts above the gorge are accessible by dirt roads on both banks and the area is steeped with Aboriginal history. Evidence of prehistoric volcanic activity in the area also exists in the soil and stone of nearby hills.