* formerly Dortmund Westfalenhalle The Dortmund–Soest railway is a line in the German state of North Rhine-Westphalia.

It runs from Dortmund Hauptbahnhof through the southern Dortmund district of Holzwickede to Unna and from there through the Hellweg Börde parallel to the Haarstrang ridge on the southern edge of the Westphalian Lowland via Werl to Soest.

It is served for its full length by the Regionalbahn RB 59 Hellwegbahn service of the Hellweg Network.

After an initial proposal to build a railway from Dortmund to Soest was approved in 1850, on 3 June 1852, the Prussian king, Frederick William IV issued a cabinet order authorising the construction of the line from Dortmund-Hörde to Soest.

These services are operated by Stadler FLIRT Electric multiple units at speeds of up to 160 km/h (99 mph).