Sandesberg, Hill summit in Ostenfeld, Germany.

Sandesberg is a small hill near Ostenfeld in Schleswig-Holstein that rises approximately 53 meters above the surrounding land. Its slopes are covered with grass and low vegetation, offering clear views across the flat North Frisian landscape in all directions.

Sandesberg is an old moraine of the Bredstedt-Husum Geest, left in place as the glaciers of the Fennoscandian ice sheet melted during the Saale complex, the second-to-last glaciation. The Danish name Sundsbjerg is used for the same hill, which rises to 53.5 m and is the highest point in the Nordfriesland district.

The hill carries two names: Sundsbjerg in Danish and Sandesberg in German, reflecting the language boundary just south of the Danish-German border. It lies about a kilometre east of Østerfjolde (Ostenfeld) and west of the Trene river, on the Bredstedt-Husumer Geest ridge.

Walking trails from Ostenfeld lead to the summit, and parking is available near the village. Wear shoes with good grip since the grassy slopes can become slippery in wet conditions.

The German Wikipedia gives the height as at least 52 metres, the Danish as 53.5 metres; both agree it is the highest point in Nordfriesland. The hill is an old moraine left by the Fennoscandian ice sheet during the Saale glaciation, about 700 metres east of Ostenfeld's northern exit.