Glenbrook Creek is a freshwater tributary of the Nepean River.
It is located within the Blue Mountains of New South Wales, Australia.
The headwaters of Glenbrook Creek are approximately 5 km south-east of Linden, in the Blue Mountains National Park.
[1] It starts at an altitude of 300m, and empties into the Nepean River at 30m, which is a descent of 270m.
The lower reach of the creek passes through a valley known as "Glenbrook Gorge".