Snelsmore Common is a 104-hectare (260-acre) biological Site of Special Scientific Interest north of Newbury in Berkshire.

[1][2] It is owned by West Berkshire Council and managed by the Berkshire, Buckinghamshire and Oxfordshire Wildlife Trust.

[3] This is a country park which has diverse habitats, including dry heath, wet heath, bog, birch woods and ancient semi-natural broadleaved woodland.

The bog has a 5,000 year old layer of peat which has been studied stratigraphically to show changes in ancient land use and vegetation.

An area of wet alder woodland has many lichens, including a rich community which grows on trees, such as Parmelia caperarta, Pertusaria pertusa and Lecanactis abietina.