{{Infobox rail line |name=Dortmund–Soest railway |native_name =Bahnstrecke Dortmund–Soest |native_name_lang = de |routenumber = 431 | linenumber = 2103 | linelength_km= 54 |gauge = | electrification = 15 kV/16.7 Hz AC overhead catenary |speed = (max) |tracks = 2 | image= Eisenbahn Dortmund Soest01.png | image_width = 250px |locale=North Rhine-Westphalia |map_state= |map= {{Routemap|inline=1 |footnote=Source: German railway atlas * formerly Dortmund Westfalenhalle|map= STR~~ ~~ ~~Main line from Hamm ABZg+r~~ ~~ ~~Line from Lünen S+BHF~~164.4~~Dortmund Hbf ABZgr~~ ~~ ~~Line to Wanne-Eickel ABZgr~~ ~~ ~~Main line to Bochum/Witten eTSHSTu~~{{BSsplit|Dortmund West (planned) ; lines|from Dortmund-Lüttgendortmund and to Unna}} ABZgr~~ ~~ ~~S-Bahn line to Witten ABZg+r~~ ~~ ~~ BST~~169.3~~Schnettkerbrücke junction BHF~~170.1~~Dortmund Signal-Iduna-Park* ABZgr~~ ~~ ~~Connecting line to Rhenish line eKRZo~~ ~~ ~~Former Rhenish line eKRZu~~ ~~ ~~Former Elias Railway eABZg+r~~ ~~ ~~Formerly from Elias Railway BHF~~173.0~~Dortmund-Hörde ABZgr~~ ~~ ~~Ardey Railway to Iserlohn BHF~~177.0~~Dortmund-Aplerbeck HST~~179.6~~Dortmund-Sölde ABZg+r~~ ~~ ~~Line from Hagen BHF~~182.0~~Holzwickede ABZg+l~~ ~~ ~~S-Bahn line from Unna-Königsborn S+BHF~~188.9~~Unna ABZgr~~ ~~ ~~Line to Fröndenberg ABZgl~~ ~~ ~~Line to Hamm HST~~193.7~~Lünern HST~~196.9~~Hemmerde BHF~~204.6~~Werl HST~~207.9~~Westönnen eHST~~210.9~~Ostönnen ABZg+l~~ ~~ ~~Line from Hamm BHF~~218.4~~Soest STR~~ ~~ ~~Line to Warburg }} }} 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. As the line was opened in 1855, it is one of the oldest railways in Germany. This electrified route is entirely double track and is classified as a main line. It is served for its full length by the Regionalbahn RB 59 Hellwegbahn service of the Hellweg Network. History 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. Construction began on 15 September 1853 in Werl. After a first test run on 7 June 1855, the Bergisch-Märkische Railway Company () operated the first scheduled train from Dortmund to Soest on 9 July 1855. The line was double tracked in 1866 and electrified by the end of 1970. Operations Regionalbahn RB 59 Hellweg-Bahn services run on the route Dortmund–Soest line, every half hour from Monday to Friday and every hour on Saturdays and Sundays. The Hellweg-Bahn has been operated by