Ilm (Thüringen)

Ilm
The Ilm near Langewiesen
Country	Germany
Basin features
Main source	Thuringian Forest
River mouth	Saale 51°6′17″N 11°40′7″E / 51.10472°N 11.66861°E / 51.10472; 11.66861Coordinates: 51°6′17″N 11°40′7″E / 51.10472°N 11.66861°E / 51.10472; 11.66861
Basin size	1,043 km2 (403 sq mi)
Physical characteristics
Length	129 km (80 mi)

The Ilm is a river 128.7 kilometers (80.0 mi) long in Thuringia, Germany. It is a left tributary of the Saale, into which it flows in Großheringen near Bad Kösen.

Towns along the Ilm are Ilmenau, Stadtilm, Kranichfeld, Bad Berka, Weimar, Apolda and Bad Sulza.

In the valley of Ilm river runs the federal motorway 87 from Ilmenau to Leipzig and two railways: the Thuringian Railway between Großheringen and Weimar and the Weimar–Kranichfeld railway. Part of the Nuremberg–Erfurt high-speed railway also runs through the upper part of the valley near Ilmenau.