Wolgan River is a 40 km long river in east New South Wales

New South Wales

New South Wales is a state of :Australia, located in the east of the country. It is bordered by Queensland, Victoria and South Australia to the north, south and west respectively. To the east, the state is bordered by the Tasman Sea, which forms part of the Pacific Ocean. New South Wales...

, Australia

Australia

Australia , officially the Commonwealth of Australia, is a country in the Southern Hemisphere comprising the mainland of the Australian continent, the island of Tasmania, and numerous smaller islands in the Indian and Pacific Oceans. It is the world's sixth-largest country by total area...

 north of Lithgow

Lithgow, New South Wales

Lithgow is a city in the Central Tablelands of New South Wales, Australia and is the centre of the local political division City of Lithgow. It is located in a mountain valley named Lithgow's Valley by John Oxley in honour of William Lithgow, the first Auditor-General of New South Wales.Lithgow is...

. It starts near Wolgan Valley at an elevation of 558 m and ends at an elevation of 178 m merging with the Capertee River

Capertee River

-References:...

 and forming Colo River

Colo River

The Colo River is a river in New South Wales, Australia.The Colo River begins at the confluence of the Wolgan River and the Capertee River, which respectively drain the Wolgan and Capertee Valleys north of Lithgow. The river flows eastwards and then south through a deep gorge in the northern...

. The majority of the river lies in Wollemi National Park

Wollemi National Park

Wollemi National Park is the second largest national park in New South Wales, and contains most of the largest wilderness area, the Wollemi Wilderness...

.

The following creeks flow into the Wolgan River: Annie Rowan Creek, Rocky Creek and Carne Creek.