Gesse

The Gesse is a 52.1 km long river in the Hautes-Pyrénées, Haute-Garonne and Gers départements, southwestern France. Its source is at Arné, on the plateau de Lannemezan. It flows generally northeast. It is a left tributary of the Save into which it flows at Espaon.

Départements and communes along its course
This list is ordered from source to mouth:
 * Hautes-Pyrénées: Arné
 * Haute-Garonne: Boudrac
 * Hautes-Pyrénées: Bazordan
 * Haute-Garonne: Saint-Loup-en-Comminges, Nizan-Gesse, Gensac-de-Boulogne, Blajan, Boulogne-sur-Gesse, Péguilhan, Lunax, Nénigan, Saint-Ferréol-de-Comminges, Puymaurin, Molas
 * Gers: Tournan
 * Haute-Garonne: Boissède
 * Gers: Cadeillan, Sabaillan, Sauveterre, Espaon,