Lothlann, a "wide and empty" plain, lay to the east of Ard-galen and north of East Beleriand, beyond the March of Maedhros and Maglor's Gap.
In the Dagor Bragollach the riders of the people of Fëanor were overwhelmed in Lothlann when the dragon Glaurung came and passed through Maglor's Gap. Many of Maglor's cavalry were burnt alive on the plain as Morgoth set fire to it.
As with most of Beleriand, it was drowned by the Great Sea at the end of the First Age.
