The Box Moor Trust is a charitable trust responsible for the management of nearly 500 acres of land within the parishes of Hemel Hempstead and Bovingdon, in Hertfordshire, England. The trust was officially founded in 1594 in order to ensure that the land in the Boxmoor area remained free for residents to use and enjoy. As a result, almost all of the land that comprises the Box Moor Trust estate is open access, with just over a quarter being common land.