| Ramena River | |
|---|---|
 Tsaratanana Massif river system | |
 | |
| Location | |
| Country | Madagascar |
| Region | Diana |
| Physical characteristics | |
| Source | at the Maromokotra peak |
| • location | Tsaratanana Massif, Diana |
| • elevation | 2,500 m (8,200 ft) |
| Mouth | Ambodimanga, Sambirano River |
• location | Diana |
• coordinates | 13°44′S48°37′E / 13.733°S 48.617°E |
• elevation | 27 m (89 ft) |
| Length | 86.2 km (53.6 mi) |
| Basin size | 1,080 km2 (420 sq mi) |
The Ramena River is a river of northwestern Madagascar in the region of Diana. It has its sources at the Maromokotra and is the main affluent of the Sambirano River. [1] Its outlet is situated at Ambodimanga Ramena.