The Westphalian Mill Route (German: Westfälische Mühlenroute) is a circular, long-distance, cycle route in the German district of Minden-Lübbecke and its neighbouring areas in North Rhine-Westphalia. The route is laid out in such a way as to take in 43 historic mills along a circular route of about 320 kilometres.
Running along largely quiet country roads, the Westphalian Mill Route takes cyclists through a cultural landscape dominated by the Wiehen and Weser Hills, the North German Plain and the River Weser. As increasing numbers of tourists have used the network of cycleways, tourist accommodation and restaurants have been established on the main routes.
There are northern and southern variants of the Mill Route. Both may also be combined with the Minden Museum Railway (e. g. at Hille, Südhemmern, Kleinenbremen), the museum railway at Rahden (e. g. Tonnenheide, Rahden) or the Minden pleasure boats (Südhemmern).
The northern route starts at the ship mill in Minden. Running initially alongside the River Weser it makes for Petershagen, where it crosses the river. After swinging around in a wide loop it returns to Petershagen via Schlüsselburg. This section is about 65 km long and runs past 11 mills.
From Petershagen the cycleway runs through Hille to Espelkamp and Rahden. In the Rahden village of Tonnenheide is the so-called Große Stein ("Great Rock"), the largest glacial erratic in northwest Germany, and in the museum farm (Museumshof) is one of the two Rossmühlen ("Stallion Mills") on the Mill Route. This section is also about 65 kilometres long.