Rio Montaña

Rio Montaña receives seasonal extreme flash floods. The angular flat substrate in the streambed, high undercut banks and high water marks on trees in the riparian are all signs this river floods annually. This year Ostional was isolated for 27 days due to this river flooding to the point it was not passable by truck or horses. This prevented the delivery of food and supplies and people leaving the Ostional area. Here's a photo of Rio Montaña in the dry season with somebody washing their flat deck truck.