The Altenbeken–Kreiensen railway is part of a former long-distance route in Germany from the Ruhr area via Altenbeken, Höxter-Ottbergen, Holzminden, Kreiensen and Seesen towards Berlin. The once continuous double track main line railway is now operated as a single track east of Ottbergen. It runs through the Egge ridge and along the northern edge of the Solling hills.

The Royal Westphalian Railway was a German rail company established in 1848 with funding from the Prussian government, which later became part of the Prussian State Railways. The network eventually extended about 315 km from Rheine via Hamm to Warburg and from Welver to Oberhausen.