The Ubaye Valley is an area in the Alpes de Haute-Provence département, in the French Alps and has approximately 7,700 residents. Its residents are called Ubayens. Its chief town is the sous-préfecture of Barcelonnette.
 Ubaye River - Hydrography
- The Ubaye River gives its name to the valley. The Ubaye rises on the Franco-Italian border, in Longet Lake, in the massive of Monte Viso. It runs from east to west during 70 km (43 mi), after it flows in the Serre-Ponçon Lake. Its main tributary is the Ubayette River, which rise in the Lauzanier Lake.
- Ubaye Valley has many lakes :
- Terre-Plaine lake
- Neuf-Couleur Lake
- Sagnes Lake
- Lauzanier lake
- Allos lake
- Petite Cayolle lake
- Mans lakes
- Longet lake
- Oronaye lake, near Longet lake
- Marinet Lake
- Its two largest towns are Barcelonnette and Jausiers. From Low Valley to High Valley, near Ubaye the towns are: Le Lauzet-Ubaye, Les Thuiles (Lauzet's hamlet), Méolans-Revel, Barcelonnette, Faucon-de-Barcelonnette, Jausiers, La Condamine-Châtelard, Saint-Paul-sur-Ubaye and Tournoux.
- There are several ski stations: Le Sauze, Pra Loup (near Barcelonnette) and Sainte Anne (near La Condamine-Châtelard.
- Two small towns in the Ubayette valley: Meyronnes and Larche.
There are only six passable vehicle roads during the summer:
- From the Haute-Provence (West) : "Pas-la-Tour" near Le Lauzet-Ubaye, open year-round
- From the Verdon (South) : Col de la Cayolle and Col d'Allos (closed in winter)
- From the Tinée (South) : Col de la Bonette at 2,750 meters, the higher road of Alps (closed in winter)
- From Stura Valley (Italy), (East): Pass of Col de Larche (closed in winter)
- From the Queyras (North) : Col de Vars (closed in winter).
- The Ubaye valley has been populated since the end of Prehistory
- A Gaulish tribe, named the Esubiens, lived in the valley during Antiquity
- It was incorporated into the Roman Empire by Augustus. A Roman road crossed the valley and the Romans occupied the Faucon-de-Barcelonnette's area.
- Christianized since the end of Roman Empire, Ubaye Valley belonged to the diocese of Embrun
- The valley was in the county of Provence during the Middle Ages.
- Barcelonnette was founded in 1231 by Ramon Berenguer IV, Count of Provence
- François Ier crossed the pass of Larche to attack Italy in the 16th century.
- Until the 1713 Treaty of Utrecht the valley from its head to the confluence of the rivers Ubaye and Durance was part of the Duchy of Savoy and was the site of two Savoyard invasions of France in 1690 and 1692.
- The French Army of the Alps was based in Ubaye during the French Revolution.
- In the 1830s, the first real road to the valley was opened.
- During the 19th century and the start of the 20th, many of Ubaye's people emigrated to Mexico.
- Ubaye Valley was occupied by Italians in 1942, then by Germans in 1943 and 1944
 Natural sites
- Massive Mountains: L'Aiguille du Chambeyron, the Séolanes, Siguret, "la Tête de Louis XVI".
- The Mercantour
- Cardinalis Tower (Barcelonnette)
- Museum of Ubaye Valley (Barcelonnette)
- "Les Villas Mexicaines" (Barcelonnette and Jausiers)
- Church of Faucon-de-Barcelonnette.
- Church Saint Nicolas de Myre (Jausiers)
- Magnans's Castle (Jausiers)
- Abriès Mill (Jausiers)
- Cuguret stronghold. (Jausiers)
- Fort de Tournoux (La Condamine-Châtelard)
- Paul Reynaud, born in Barcelonnette
- The Brothers Arnaud, born in Jausiers
- Jacques-Antoine Manuel, born in Barcelonnette
- Ubaye - Vallée de l'Ubaye - Ubaye, Barcelonnette, la Condamine-Châtelard, Enchastrayes, le Sauze, Faucon, Jausiers, Larche, Lauzet Ubaye, Méolans Revel, Laverq, Meyronnes, Saint Ours, Pontis, Saint Paul sur Ubaye, Serennes, Maurin, Maljasset, Saint Pons, les Thuiles, Uvernet Fours, Bayasse, Pra Loup, la Bréole, Saint-Vincent-les-Forts, Chambeyron, Séolane, Parpaillon