Württemberg, a hilly rather than a mountainous region, forms part of the South German tableland, also referred to as the Swiss plateau.
Estimates of land form proportions count a quarter of the entire area as plain, less than one-third as mountainous, and nearly one-half as hill-country.
The Rauhe Alb (or Alp) slopes gradually down into the plateau on its southern side, but on the north it appears sometimes rugged and steep, its line broken by isolated projecting hills.
[1] To the south of the Swabian Alb the plateau of Upper Swabia stretches to Lake Constance and eastwards across the Iller into Bavaria.
The Danube flows from east to west across southern Württemberg, a distance of 65 miles (105 km), a small section of which crosses through former Hohenzollern territory.