Beginning in the Hithaeglir south of Khazad-dûm, it flowed west-north-west until it was met by the Sirannon near the old location of Ost-in-Edhil, the capital of the Ñoldor of Eregion (Hollin). From there the Glanduin flowed towards the Mitheithel, which it met in the marshes known as Swanfleet or Nîn-in-Eilph north-east of Tharbad. From there on both rivers became the Gwathló.
It was approximately seventy-five miles in length.
On some versions of the Middle-earth map the name Swanfleet appears to be an alternative name for the river, but in fact that name apparently refers to the marshes alone.
|Rivers of Arda|
Adorn | Adurant | Anduin | Aros | Ascar | Brandywine | Brilthor | Brithon | Bruinen | Celebrant | Celebros | Celon | Celos | Ciril | Duilwen | Enchanted river | Entwash | Erui | Esgalduin | Forest River | Gelion | Gilrain | Ginglith | Gladden | Glanduin | Glithui | Greater Gelion | Greyflood | Greylin | Gwathló | Harnen | Isen | Langwell | Lefnui | Legolin | Limlight | Little Gelion | Lune | Malduin | Mering Stream | Mindeb | Mitheithel | Morgulduin | Morthond | Narog | Nenning | Nimrodel | Nunduinë | Poros | Redwater | Ringló | Ringwil | River Running | Rivil | Sarn Gebir | Serni | Sirannon | Siril | Sirion | Sirith | Snowbourn | Taeglin | Thalos | The Water | Withywindle
- The Atlas of Middle-earth pg. 81