Flowing east from the Caffas Mountains toward the coast, the Krelfassa passes through the northern White Wastes before emptying into Pugrai D'had. Unlike the Yuforhi, Krelfassa's waters are safe—cold mountain runoff that hasn't absorbed whatever contaminant gives Yuforhi its properties.
The Krelfassa marks an informal boundary between the White Wastes proper and the coastal lowlands. North of the river, survival is possible; south of it, the Wastes begin in earnest.