The Duerna is a river in the province of León, Spain. It begins at the convergence of the Cabrito and Ballina streams, in the town of Pobladura de la Sierra, in the Lucillo municipality.
| Duerna Latin: Ornia | |
|---|---|
 Watershed of the Duerna at Priaranza de la Valduerna (Maragatería) | |
 | |
| Location | |
| Country | Spain |
| Physical characteristics | |
| Source | Union of the streams Cabrito and Ballina |
| • location | Pobladura de la Sierra, Lucillo, Maragatería, León, Castile and León, Spain |
| • elevation | 1,120 m (3,670 ft) |
| Mouth | Tuerto river |
• location | Requejo de la Vega, Soto de la Vega, Tierra de La Bañeza, León, Castile and León, Spain |
• elevation | 775 m (2,543 ft) |
| Length | 54 km (34 mi) |
| Basin size | 317 km2 (122 sq mi) |
| Basin features | |
| Tributaries | |
| • left | Peces |
| • right | Espino, Llamas |
42°18′36″N 5°53′46″W / 42.3100°N 5.8961°W