It crosses the communes of Aiti, Cambia, Carticasi, Castineta, Érone, Gavignano, Lano, Morosaglia, Saliceto and San-Lorenzo.

[1] The Casaluna rises to the west of the 1,712 metres (5,617 ft) Monte Muffraje in the commune of Carticasi.

It flows with many meanders in a generally northwest direction to its confluence with the Golo to the south of Ponte Leccia.

[2] On 24 November 2016 an exceptionally violent storm hit central Corsica and caused widespread flooding.

Although some of the local people wanted the old bridge to be rebuilt, that would be vulnerable to a similar storm, which was expected to become increasingly common as the climate changed.