The Dutch forest reserves network encompasses about 60 forest reserves representing all major forest types in the Netherlands. The reserves were designated between 1983 and 2000. The present Access-database presents all measurements (mostly between 1982 and 2005) on trees and regeneration in circular sample plots throughout the reserves and in a one ha rectangular core area in each reserve. The data set also includes map data at the reserve level (such as reserve boundaries, samples plots and core areas) and of GIS files derived from tree measurements in the core area.