It seems to be a tradition, we found out afterwards: Saturday before Christmas a run is held in this little town, over distances of 2, 10 and 21.2 kilometers. Indeed: Half a marathon. For those that do not want to run, the same distances can be walked; That is: 5, 10 and, indeed, 21.2 kilometers.
The first part leads from Linschoten along the river called “Lange Linschoten” to Oudewater, another old small city, and from there along dykes and polder roads – all straight on – back to Woerden, where the Lange Linschoten was reached again, and that was followed into Linschoten.
The first part has been covered before: in one of the legs of the UtrechtPad, but in the opposite direction.
I took some pictures along the way, and the track is available in Garmin, general, and Comma-separated formats.