Guy Fawkes River, a perennial stream[3] that is part of the Clarence River catchment, is in the New England and Northern Tablelands districts of New South Wales, Australia.

Guy Fawkes River rises below Majors Point, on the northern slopes of the Snowy Range, an eastern spur of the Great Dividing Range, east of the village of Ebor.

The river descends 1,110 metres (3,640 ft) over its 101 kilometres (63 mi) course;[2] and passes below Round Mountain, the highest peak of the Northern Tablelands.

The Bicentennial National Trail runs along the western side of Guy Fawkes River on what is a travelling stock route.

[6] The largest of the Grevillea genus, Southern Silky Oak, or Grevillea robusta, is distributed in the Guy Fawkes River area, which is the southern limit of its natural environment.