The Thuringian Forest
running northwest to southeast, forms a continuous stretch of rounded hills in the German
state of Thuringia
. It is about 120 km long and 35 km wide. The highest elevation is the Großer Beerberg
The Rennsteig, an ancient path following its summits along the main ridge, now a famous hiking path, marks the traditional boundary between northern and central Germany, the boundary between Thuringia and Franconia. Dialect,and traditional customs and costumes were different on either side of the Rennsteig.
The Thuringian Forest is famous for Wartburg Castle where (Martin Luther stayed for some time in exile) and winter sports resorts.