Marline Valley Woods is a 55.1-hectare (136-acre) biological Site of Special Scientific Interest on the western outskirts of Hastings in East Sussex.

[1][2] An area of 40.3 hectares (100 acres) is a Local Nature Reserve[3][4] owned by Hastings Borough Council and managed by the Sussex Wildlife Trust.

[5] This site has ancient woodland and species rich unimproved grassland.

The wood has standards of pedunculate oak and coppice of hornbeam, hazel and sweet chestnut.

A stream runs along a steep sided valley which has 61 species of mosses and liverworts, including some uncommon species.