The Tweed Range is the western extension of the Tweed Volcano

Tweed Volcano

Tweed Volcano was an early Miocene shield volcano in northeastern New South Wales, Australia. In the course of about three million years, Tweed Volcano was formed over the East Australia hotspot when this part of the continent passed over it around 23 million years ago...

 caldera rim in northern 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...

. The range marks the southern extinct of the Scenic Rim

Scenic Rim

The Scenic Rim is a group of forested mountain ranges of the Great Dividing Range straddling the border between south-eastern Queensland and north-eastern New South Wales, Australia.-Description:...

. The Bar Mountain massif is the highest point on the range, rising to 1130 m above sea level. To the west lies McPherson Range

McPherson Range

The McPherson Range is an extensive mountain range, a spur of the Great Dividing Range, heading in an easterly direction from near Wallangarra to the Pacific Ocean coastline. It forms part of the Scenic Rim on the border between the states of New South Wales and Queensland. Further west of the...

 and Levers Plateau, in the north is the Lamington Plateau

Lamington National Park

Lamington is a national park in Queensland, Australia, lying on the Lamington Plateau of the McPherson Range on the Queensland/New South Wales border...

 with the Nightcap Range extending around the southern parts of the caldera rim, south east of the Tweed Range.

Most of the range is covered by rainforest and protected within the Border Ranges National Park

Border Ranges National Park

Border Ranges National Park, 150 km south of Brisbane, Australia, is in northern New South Wales with a small portion located in Queensland....

, part of the Gondwana Rainforests of Australia and Mebbin State Forest. The 64 km long Tweed Range Scenic Drive is a road through the park and along the range that provides access to lookouts over the Tweed Valley, including The Pinnacle Lookout and Blackbutts Lookout.

In the east the catchments of Byril Creek, Oxley River and Rous River

Rous River

The Rous River is a river in the Northern Rivers region of the state of New South Wales in Australia. It is a tributary of the Tweed River, joining the Tweed at Tumbulgum, northeast of Murwillumbah....

, tributaries of the Tweed River

Tweed River (New South Wales)

The Tweed River is a short river in the Northern Rivers region of New South Wales, Australia. Its drainage basin consists mostly of the erosion caldera of the Tweed Volcano, a huge extinct volcano of which Mount Warning is the volcanic plug...

 drain the steep valley slopes. In the west a series of creeks, among them Brindle Creek, flow into the Richmond River

Richmond River

The Richmond River is a river in the north-eastern corner of New South Wales, Australia. It runs for approximately 170 km from the foothills of the Border Ranges past the towns of Kyogle, Casino, Coraki, Woodburn, where it turns northward and empties into the Pacific Ocean at Ballina. It has a...

.