Beacon Hill is the highest hill in eastern Monmouthshire, South Wales. It is located due east of the village of Trellech, and north-west of Llandogo. Its crowning point at 306m / 1006 ft above sea level is marked by an Ordnance Survey triangulation pillar. The summit, eastern slopes and uppermost western slopes are owned by Natural Resources Wales which manages the area not only for timber production but for recreation also.