Despite the demise of many landed estates in the twentieth century, the creation of the Forestry Commission and consequent massive afforestation, over two-thirds of British woodland remained in the hands of private land owners at the end of the century. Little research has been carried out into the changing role of landed estates in forming and maintaining woodland landscapes in this period. This paper examines forestry on the Thoresby estate, Sherwood Forest, Nottinghamshire using a wide range of sources. It demonstrates the dynamic nature of this landscape during the twentieth century. Rather than being a slowly changing woodland landscape, it has been transformed through interventions by land agents and landowners in response to changing social, economic and government policy pressures.