The Blue Mountains are a dissected plateau carved in sandstone bedrock.
They are now a series of ridge lines separated by gorges up to 760 metres (2,490 ft) deep.
The highest point in the Blue Mountains, as it is now defined, is an unnamed point with an elevation of 1,189 m (3,901 ft) AHD , located 7 kilometres (4.3 mi) north-east of Lithgow.
However, the highest point in the broader region that was once considered to be the Blue Mountains is Mount Bindo, with an elevation 1,362 m (4,469 ft) AHD .
A large part of the Blue Mountains is incorporated into the Greater Blue Mountains Area World Heritage Site, consisting of seven national park areas and a conservation reserve.

The Blue Mountains area is a distinct physiographic section of the larger Hunter-Hawkesbury Sunkland province.
This is in turn a part of the larger East Australian Cordillera physiographic division.
The Blue Mountains are a dissected plateau carved in sandstone bedrock. They are now a series of ridge lines separated by gorges up to 760 metres (2,490 ft) deep. The highest point in the Blue Mountains, as it is now defined, is an unnamed point with an elevation of 1,189 m (3,901 ft) AHD , located 7 kilometres (4.3 mi) north-east of Lithgow. However, the highest point in the broader region that was once considered to be the Blue Mountains is Mount Bindo, with an elevation 1,362 m (4,469 ft) AHD . A large part of the Blue Mountains is incorporated into the Greater Blue Mountains Area World Heritage Site, consisting of seven national park areas and a conservation reserve.
The Blue Mountains area is a distinct physiographic section of the larger Hunter-Hawkesbury Sunkland province. This is in turn a part of the larger East Australian Cordillera physiographic division.
Blue Mountains (New South Wales)