Hutton Roof Crags is denoted a Site of Special Scientific Interest by English Nature. The area, approximately 100 hectares is also very close to the Farleton Knott SSSI. This area holds nationally significant limestone pavement and is rich in rare flora and fauna. Read the Citation from English Nature for full details.
In or beside the SSSI is Hutton Roof Crags and Park Wood National Nature Reserve which are managed by Cumbria Wildlife Trust. There is also Holme Park Fell, belonging to the National Trust (managed as part of the Trust's Arnside & Silverdale property, but actually it is 4 miles further East), Holme Park Quarry Local Nature Reserve and Clawthorpe Fell National Nature Reserve. There is a useful leaflet "Limestone Landscapes" covering the whole area.
According to English Nature 'Park Wood lies on a limestone ridge. It is an example of rare northern calcareous ashwood with hazel, wych elm and maple. The reserve is managed by Cumbria Wildlife Trust, and supports important butterfly and moth populations'