The park is approximately three miles (4.8 km) long and consists of mainly deciduous, riparian woodland on each side of the Roe.
The terrain next to the river is mostly steep sided gorge, with some areas of flat grassland on the northwest bank.
As the river has a large, freely draining catchment area, it significantly increases in volume and speed soon after heavy rain.
In the 18th century, the local linen industry was based on the same site, the remains of which include flax drying fields with watch towers, derelict buildings and a waterwheel originally used to power the machinery.
[3] Parts of the river containing rapids and weirs are used for kayaking, although the park officially bans boats and canoes.