Forfalas was the northern half of the region of Falas, located south of Nevrast, and northwest of Eglamar.
The region of Forfalas was marked on the Second 'Silmarillion' Map, which formed the basis for the map of Beleriand in the published Silmarillion.
However, apart from being labeled on the aforementioned map, Forfalas was never mentioned again, nor did it appear in any of the narratives, annals or essays set in the First Age.