It flows into the Hürbe river, a tributary of the Brenz, which in turn discharges into the Danube.

The Lone rises from a Karst spring with a large discharge near Urpsring, in the municipality of Lonsee, Baden-Württemberg.

[2] The valley of the Lone is fairly shallow, with rises of only around 50 m on both sides.

The karst on the slopes contains various caves and protuberances which were repeatedly visited by prehistoric hunter/gatherer groups as long ago as the Paleolithic and post-Ice Age Mesolithic.

[2] Among these are the Bocksteinhöhle, Hohlenstein-Stadel and Vogelherd Cave, locations of important pre-historic findings.