The Sonnenberg rises in the RurEifel within the High Fens-Eifel Nature Park and is entirely within the borough of Heimbach. Its summit lies 1.1 km northeast of Hengebach Castle , which is situated in the heart of the town of Heimbach on the River Rur, and 1.2 km south-southwest of the village church of Hausen, which is further downstream. At the western foot of the hill is the village of Fischbachtal, a small settlement between Heimbach and Hausen, and about km east lies the village of Vlatten. To the south the countryside transitions to the Eichelberg hill near Heimbach. A northern spur of the Sonnenberg, towards Hausen, is called the Rensberg which, on topographical maps somewhat north of its name at almost the same spot gives the heights as 348.4 m and 346.5 m. The Sonnenberg descends steeply to the Rur; from the summit to the river near Hausen is a heightdifference of about 200 metres. The hillsides above the Rur are, in places, characterised by prominent slate crags. The Sonnenberg is partly used for agriculture. In addition, a gas pipeline and a 110-kV pylon runs over it. There are several shrines and altars to the Madonna and Child.
Natural regions
The Sonnenberg is in the natural region major unit group of the West Eifel/Ardennes, in the major unit of the Rur Eifel, in the subunit of the Rur-Urft-Olef valleys and in the natural region of the Heimbach-Maubacher Rurtal.
Protected areas
On the Sonnenberg, which is covered by the woods of the Hausener Busch, lie parts of the protected area of Kreis Düren . On its lower slopes in the south, west and northwest are separate elements of the nature reserve of Buntsandsteinfelsen im Rurtal zwischen Heimbach und Kreuzau.
Transport and walking
The Landesstraße 249 runs along the Rur from Heimbach to Hausen passing the Sonnenberg to the west. South of the hill it crosses the L 218 in Heimbach; the latter runs from Vlatten through Heimbach to Hasenfeld. From these and other roads or in the villages mentioned the hill may be reached on numerous woodland tracks and paths; it is a popular walking area. The E8 European long distance path runs past the Sonnenberg to the south through Heimbach.
