The Nera is a 116-kilometre (72 mi) long river that flows almost entirely in Umbria, Italy. It is the largest tributary to the Tiber, its sources are in the Monti Sibillini, east of Foligno. It flows southward past Terni and Narni. It joins the Tiber near Orte.
The view of Nera in Castelsantangelo sul Nera
|⁃ elevation||1,800 m (5,900 ft)|
|Length||116 km (72 mi)|
|Basin size||4,280 km2 (1,650 sq mi)|
|⁃ average||168 m3/s (5,900 cu ft/s)|