The Jamison Valley stretches north-south from just outside Katoomba to the Mount Solitary ridge; in this direction it is approximately 4 kilometres (2.5 mi) long.
From west to east, it stretches from Narrow Neck Plateau to Kings Tableland, making it approximately 10 kilometres (6.2 mi) wide.
Like the entire Sydney and Blue Mountains region, the valley is a sandstone area, characterised by steep sandstone cliffs.
Deeper into the soil there is a layer of shale, which is softer than the sandstone.
As this layer of shale was eroded by the watercourses, it collapsed and brought the sandstone down with it, creating the characteristic sandstone valleys and canyons of the Blue Mountains, of which the Jamison Valley is one.

The valley is densely forested, with eucalypt forest over most of its expanse and occasional pockets of semi-rainforest in gullies, where water is concentrated.
The northern escarpment is deeply serrated, having been carved up by watercourses over millions of years.
Watercourses include Jamison Creek, Valley of the Waters Creek, Gordons Creek, Leura Falls Creek, Kedumba River and Causeway Creek.
There are also numerous waterfalls, including Wentworth Falls, Empress Falls, Vera Falls, Gordon Falls, Leura Falls and Katoomba Falls.

In this part of the valley there was formerly a sewage treatment plant, not far below the northern escarpment.
It was serviced by a dirt road that went up to Kings Tableland and thence to Wentworth Falls town.
The plant was closed down in the 1990s, but the service road remains and can be used by bushwalkers.

The only mountain in the valley is Mount Solitary, which sprawls across the south of the valley from west to east.
It is joined to Narrow Neck Plateau by a low ridge which is also the site of the Ruined Castle, a rock formation that is popular with bushwalkers.
Immediately east of Mount Solitary is a property called Kedumba Farm, which is no longer worked as a farm.

South of Mount Solitary, the valley sprawls through Cedar and Kedumba Valley down to Coxs River and Lake Burragorang, the lake that was created when Warragamba Dam was built.
There is a 3 kilometres (1.9 mi) prohibited area around the river and lake to protect Sydney's water supply.
Around this area there is a high-tension power line that crosses the valley from east to west; it is followed by a series of service roads that provide access to the powerline and to the area, although much of it is in the prohibited area.
These service roads make it possible to do a trek taking in the whole valley, but it is necessary to get permission from Sydney Water to go through the prohibited area.
The Katoomba and Jamison topographic maps are essential for any of these walks.
The Jamison Valley stretches north-south from just outside Katoomba to the Mount Solitary ridge; in this direction it is approximately 4 kilometres (2.5 mi) long. From west to east, it stretches from Narrow Neck Plateau to Kings Tableland, making it approximately 10 kilometres (6.2 mi) wide. Like the entire Sydney and Blue Mountains region, the valley is a sandstone area, characterised by steep sandstone cliffs. Deeper into the soil there is a layer of shale, which is softer than the sandstone. As this layer of shale was eroded by the watercourses, it collapsed and brought the sandstone down with it, creating the characteristic sandstone valleys and canyons of the Blue Mountains, of which the Jamison Valley is one.
The valley is densely forested, with eucalypt forest over most of its expanse and occasional pockets of semi-rainforest in gullies, where water is concentrated. The northern escarpment is deeply serrated, having been carved up by watercourses over millions of years. Watercourses include Jamison Creek, Valley of the Waters Creek, Gordons Creek, Leura Falls Creek, Kedumba River and Causeway Creek. There are also numerous waterfalls, including Wentworth Falls, Empress Falls, Vera Falls, Gordon Falls, Leura Falls and Katoomba Falls.
In this part of the valley there was formerly a sewage treatment plant, not far below the northern escarpment. It was serviced by a dirt road that went up to Kings Tableland and thence to Wentworth Falls town. The plant was closed down in the 1990s, but the service road remains and can be used by bushwalkers.
The only mountain in the valley is Mount Solitary, which sprawls across the south of the valley from west to east. It is joined to Narrow Neck Plateau by a low ridge which is also the site of the Ruined Castle, a rock formation that is popular with bushwalkers. Immediately east of Mount Solitary is a property called Kedumba Farm, which is no longer worked as a farm.
South of Mount Solitary, the valley sprawls through Cedar and Kedumba Valley down to Coxs River and Lake Burragorang, the lake that was created when Warragamba Dam was built. There is a 3 kilometres (1.9 mi) prohibited area around the river and lake to protect Sydney's water supply. Around this area there is a high-tension power line that crosses the valley from east to west; it is followed by a series of service roads that provide access to the powerline and to the area, although much of it is in the prohibited area. These service roads make it possible to do a trek taking in the whole valley, but it is necessary to get permission from Sydney Water to go through the prohibited area. The Katoomba and Jamison topographic maps are essential for any of these walks.
Jamison Valley