Lahn Lahn (Rhine tributary) Lahn: river – about 242 km long; drainage basin about 5,964 km²; countries: Germany; flows into: Rhine; mean discharge at the mouth about 54 m³/s.
Key facts Type River Length 242 km Drainage basin 5,964 km² Mean discharge 54 m³/s Source Lahn spring Mouth Rhine Countries Germany Source coordinates 50.8923, 8.2416 Wikidata Wikidata Q103148 Source: Wikidata Q103148 · Licence: CC0 1.0 · Retrieved 2026-10-23. Wikidata values may be incomplete; lengths and areas vary with the measuring method.
Cycle routes along the river Radweg Deutsche Einheit - Etappe 2 Radweg Deutsche Einheit - Etappe 3 Radweg Deutsche Einheit - Etappe 4 Deutscher Limes-Radweg 1. Abschnitt Bad Hönningen - Holzhausen Radweg Deutsche Einheit - Abschnitt 2 Rhein-Route D8 [Rheinland-Pfalz] Saar-Mosel-Main [Koblenz - Mainz] EuroVelo 15 - Rheinradweg - Teilstrecke Bingen - Köln Long-distance cycle routes (EuroVelo, German D-network and others) passing within 3 km of a gauge on this river.
Water body status (WFD) 0 of 7 water bodies at the gauges reach at least good ecological status or potential.