The Ramena River is a river of northwestern

Madagascar Madagascar, officially the Republic of Madagascar, is an island country that includes the island of Madagascar and numerous smaller peripheral islands. Lying off the southeastern coast of Africa, it is the world's List of islands by area, f ...

in the region of

Diana Diana most commonly refers to: * Diana (name), given name (including a list of people with the name) * Diana (mythology), ancient Roman goddess of the hunt and wild animals; later associated with the Moon * Diana, Princess of Wales (1961–1997), ...

. It has its sources at the Maromokotra and is the main affluent of the

Sambirano River The Sambirano is a river of northwestern Madagascar in the region of Diana. It has its sources at the Maromokotra peak and flows through the Tsaratanana Reserve to the Indian Ocean. Its delta occupies 250 km. The ecosystem of the river, mai ...

.
Monographie de la Région Diana
(page 13)] Its outlet is situated at Ambodimanga Ramena.

References

Rivers of Diana Region Rivers of Madagascar {{Madagascar-river-stub