Deadwood is a basic component in forest ecosystems, since it supports many ecological and functional roles. The importance of deadwood is recognized by the pan-European criteria, identifying it as an index of sustainable forest management. Currently, its assessment is considered essential for the management of forest resources both in “wild” and in areas managed via “close-to-nature silviculture”, even if also for productive forests the deadwood dynamics are very interesting and more and more studied. Despite the importance of deadwood for assessing the sustainability of forest management, information on this fundamental parameter of forest ecosystems is documented mainly for protected areas, while for managed forests it is much scarcer. Too little is known of the influence that rights of use, by virtue of laws or customary law, have in close-to-nature forest management. The study aims to assess the deadwood in managed beech forests of the National Park of Abruzzo, Lazio and Molise. These forests have an important socio-economic function for inhabitants, that collect deadwood observing the park regulation. The deadwood gradient moving from logging roads was investigated. Three accessibility classes were established, and data analysis has been performed on this classification. The result showed that the accessibility to the forest affects the quantity and the decay class of the deadwood, thus influencing carbon storage. In conclusion, the deadwood removal influences the quantity of deadwood in the forest and the removal is influenced by the distance from the road. The results highlighted useful elements for the active management of the beech forests of the National Park aimed at the conservation and increase of the deadwood component of the mid-mountain forest ecosystems. These findings can also be considered in sustainable forest management, as the practice of collecting deadwood for fuelwood is a social aspect that cannot be forgotten.