| Guy Fawkes River | |
| Name Etymology: | Explored by European settlers on Guy Fawkes Day, 1845 |
| Subdivision Type1: | Country |
| Subdivision Name1: | Australia |
| Subdivision Type2: | State |
| Subdivision Name2: | New South Wales |
| Subdivision Type3: | IBRA |
| Subdivision Name3: | New England Tablelands |
| Subdivision Type4: | District |
| Subdivision Name4: | New England, Northern Tablelands |
| Subdivision Type5: | Municipality |
| Subdivision Name5: | Guyra |
| Length: | 101km (63miles) |
| Source1: | Snowy Range, Great Dividing Range |
| Source1 Location: | southeast of Ebor |
| Source1 Elevation: | 1410m (4,630feet) |
| Mouth: | confluence with the Sara River to form the Boyd River |
| Mouth Location: | within Guy Fawkes River National Park |
| Mouth Elevation: | 304m (997feet) |
| River System: | Clarence River catchment |
| Tributaries Left: | Aberfoyle River, Doughboy Creek |
| Tributaries Right: | Pantons Creek, Marengo Creek |
| Custom Label: | National park |
| Custom Data: | Guy Fawkes River NP |
| Extra: | [1] |
Guy Fawkes River, a perennial stream 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 spills over the columned basalt rock Ebor Falls,[2] and enters a deep valley, joined by four tributaries, including Aberfoyle River, flowing generally northward and eventually forming its confluence with the Sara River to form the Boyd River. The river descends over its course;[1] and passes below Round Mountain, the highest peak of the Northern Tablelands.
The river's course generally runs from the south to north along the valley of the Demon Fault Line, within the Guy Fawkes River National Park.[3] Adjoining the national park are the Guy Fawkes River Nature Reserve and Guy Fawkes River State Conservation Area.
The Bicentennial National Trail runs along the western side of Guy Fawkes River on what is a travelling stock route.[4]
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. It has attractive orange-yellow flowers and may reach up to with a trunk diameter in excess of .[5]
The river is named after Guy Fawkes Day. Major Edward Parke named the Guy Fawkes River after camping nearby on Guy Fawkes Day, 5 November 1845.[6]