Mount Portal Lookout, is found a short walk from the end of Mount Portal trail (a dirt road) in the Glenbrook Region of the Blue Mountains National Park. The lookout is wheelchair accessible and has a fenced platform providing great views from high above the junction of the Nepean River and Glenbrook Creek. The main view is down the Nepean River and across the plains of western Sydney (the Cumberland Plain). The view extends up Glenbrook Gorge and to the stunning cliffs on the other side. A stunning spot. This is also a popular abseiling cliff with information signs about the local area.