Kalter Wangen, Mountain summit in Klettgau, Germany.

Kalter Wangen is a mountain summit located in the Klettgau region between the towns of Stetten and Grießen in Baden-Württemberg. The terrain is characterized by dense limestone formations from the Malm period and offers views toward the Alps from its peak.

From 1967 to 1988 the Landstraße 161a on the mountain's flank hosted the Kalter Wangen hill climb. The race was regarded as safe, yet serious accidents kept occurring in ordinary traffic on the same road. The event ended after the 1988 season.

The name refers to the exposed "Wange" (flank) that faces westerly storms, especially in winter. From 1967 to 1988 the L161a road on this flank hosted the Kalter Wangen hill climb, considered safe, while serious accidents kept occurring in ordinary traffic on the same stretch.

The Landesstraße 161a runs along the mountain's flank between Stetten and Grießen, and the summit is reached on foot from these villages. The western "Wange" is exposed to storms arriving from the west, especially in winter, so the road sees repeated serious accidents in ordinary traffic. On clear days the summit and its surroundings allow a view of the Alps.

The limestone formations here occasionally contain remnants of coral reefs and sea urchins from the Malm age. These fossil traces remind visitors that the region once lay beneath a warm shallow sea.