Wageningen Environmental Research (WENR) has been in the process of updating the Soil Map of the Netherlands, scale 1:50,000, since 2010. The map distinguishes between various different soil units with peat layers in the upper horizons of the profile. The thickness of the peat is being reduced by oxidation and subsidence. To manage these peat soils it is important to have information on the thickness of the peat layer. This study has resulted in a peat thickness map for the peat soil areas around the Utrechtse Heuvelrug north of Utrecht and in the vicinity of Veenendaal and an updated soil map of these peat soil areas at scale 1:50,000.