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Mulgrave
Goldsbrough.jpg
The Mulgrave River in the Goldsbrough Valley
Country Australia
State Queensland
Region Far North Queensland
Physical characteristics
Main source Bellenden Ker Range
2nd source West Mulgrave River
west of Babinda
376 m (1,234 ft)
3rd source East Mulgrave River
below South Peak
665 m (2,182 ft)
River mouth Coral Sea
Mutchero Inlet
0 m (0 ft)
Length 70 km (43 mi)
Basin features
Basin size 1,315 km2 (508 sq mi)
Tributaries
National parks Wooroonooran National Park; Russell River National Park

The Mulgrave River, incorporating the East Mulgrave River and the West Mulgrave River, is a river system located in Far North Queensland, Australia. The 70-kilometre (43 mi)-long river flows towards the Coral Sea and is located approximately 50 kilometres (31 mi) south of Cairns.

Location and features

Walsh's-Pyramid-view-from-summit-2008-10-02 at 08-27-22
Catchment of the Mulgrave River southeast of Gordonvale.

Sourced by runoff from the Bellenden Ker Range, the headwaters of the Mulgrave River rise as the east and west branches of the river below South Peak and west of Babinda respectively. The two branches form their confluence within the Wooroonooran National Park and the Wet Tropics World Heritage Area. The Mulgrave River flows generally north towards Little Mulgrave and through the outskirts of Gordonvale and flows through the Goldsborough Valley. From Gordonvale the river flows east by south and then south where the Mulgrave River empties into the Coral Sea 30 kilometres (19 mi) south at the southern extremity of the Yarrabah Hills range where the Mulgrave meets the Russell River. The Trinity Inlet was once the river mouth of the Mulgrave River. Volcanic activity that resulted in the rise of Green Hill in the Mulgrave Valley blocked the river from entering the sea near present-day Cairns. However, further research has shown river sediments above the basalt flows and it is now believed that other factors such as alluvial sediments may have altered the river's course and that perhaps it has alternated between the two mouths over time.

The river has a catchment area of 1,315 square kilometres (508 sq mi). From source to mouth, incorporating the east and west branches of the river, the river descends 665 metres (2,182 ft) over a combined 78 kilometres (48 mi) course.

The river is crossed by the Bruce Highway south of Gordonvale via the Desmond Trannore Bridge.

Gold was discovered in the river in the 1870s, bringing considerable change to the Goldsborough Valley. Gravel is now extracted from the riverbed.

Freshwater stonefish and crocodiles are found in the river, so caution is advised if swimming in the river. The pest fish tilapia have been discovered in the river and have been the target of eradication efforts.

Together with the Russell River, the Mulgrave River has a quite well-recorded flood history with documented evidence of flooding beginning in the late 19th century.

Language

Yidinji (also known as Yidinj, Yidiny, and Idindji) is an Australian Aboriginal language. Its traditional language region is within the local government areas of Cairns Region and Tablelands Region, in such localities as Cairns, Gordonvale, and the Mulgrave River, and the southern part of the Atherton Tableland including Atherton and Kairi.

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