Weiße Mauer, Natural geological formation in Oberursel, Germany.

Weiße Mauer is a natural white quartzite rock formation in the Taunus landscape near Oberursel. The boulder fields and stone outcrops were created through natural geological processes and stand out distinctly against the surrounding forest.

The formation was shaped during the Ice Age when intense frost action fractured the hard quartzite rock. This natural weathering process created the distinctive stone fields and rock configurations visible today.

The name Weiße Mauer refers to the white gleam of the quartzite blocks in sunlight, which makes the slope look like a stone quarry from the Kanonenstraße. The E1 European long-distance path crosses the southern uplands of the field, coming from the Fuchstanz pass and continuing over the Altkönig; after the field it descends east to the Hohemark in the Urselbach valley.

The White Wall lies on the northeastern slope of the Altkönig, about 1.4 km from the summit and 6 km northwest of Oberursel's centre, inside the Altkönig nature reserve. The E1 European long-distance path crosses its southern uplands, coming from the Fuchstanz pass (662 m) to the west and continuing over the Altkönig; after the quartzite field it descends east to the Hohe Mark in the Urselbach valley. The route partly leaves the paved track, so sturdy footwear helps on the blocks.

The White Wall is a blockfield of Taunus quartzite, the same rock as the Altkönig hillfort and the nearby Marmorstein, Elisabethenstein and Goldgrube formations. Seen from the Kanonenstraße pass above Oberursel it resembles a stone quarry, and in sunlight the blocks gleam white, which gave the field its name.