Gamlingay Wood is 46 ha (114 acres) of woodland managed as a nature reserve by the Wildlife Trust for Bedfordshire, Cambridgeshire, Northamptonshire and Peterborough. It has been designated a Site of Special Scientific Interest since 1955. It was listed in the Domesday Book and appears to have been woodland for at least 1000 years. However during the 20th century, much of the wood was felled and planted with a mix of oak and conifers. Under the Wildlife Trust's management the conifers are being harvested, to allow native trees to regenerate. For example, in 1999 300 tons of conifer timber was removed from one of the compartments.