 The European Watershed, the divide between the Rhine and Danube watersheds, occurs in the town's territory.The source of the Prim, which joins the Neckar (a tributary of the Rhine) in Rottweil, is located only a kilometer away from the source of the Faulenbach, an eventual tributary of the Danube, in neighboring Dürbheim.Balgheim is bordered by Böttingen to the north, Dürbheim to the southeast, Rietheim-Weilheim to the south, and the city Spaichingen to the west.