The Truyère is a 167 km long river

River

A river is a natural watercourse, usually freshwater, flowing towards an ocean, a lake, a sea, or another river. In a few cases, a river simply flows into the ground or dries up completely before reaching another body of water. Small rivers may also be called by several other names, including...

 in south-western France

France

The French Republic , The French Republic , The French Republic , (commonly known as France , is a unitary semi-presidential republic in Western Europe with several overseas territories and islands located on other continents and in the Indian, Pacific, and Atlantic oceans. Metropolitan France...

, right tributary of the Lot River

Lot River

The Lot, , originally the Olt , is a river in France, right tributary of the Garonne. It rises in the Cévennes, flowing west through Quercy, where it flows into the Garonne near Aiguillon, a total distance of...

. Its source is in the south-western Massif Central

Massif Central

The Massif Central is an elevated region in south-central France, consisting of mountains and plateaux....

, north of Mende

Mende, Lozère

Mende is a commune of France in the Lozère department of which it is the capital.It is the seat of the Roman Catholic Diocese of Mende.-Sights:* Mende Cathedral -External links:* * ,...

. It flows generally west through the following départements and towns:

• Lozère
  Lozère
  Lozère , is a department in southeast France near the Massif Central, named after Mont Lozère.- History :Lozère is one of the original 83 departments created during the French Revolution on March 4, 1790...
  
  : Le Malzieu-Ville
  Le Malzieu-Ville
  Le Malzieu-Ville is a commune in the Lozère department in southern France.-References:*...
  
  
• Cantal
  Cantal
  Cantal is a department in south-central France. It is named after the Cantal mountain range, a group of extinct, eroded volcanic peaks, which covers much of the department. Residents are known as Cantaliens or Cantalous....
  
  
• Aveyron
  Aveyron
  Aveyron is a département in southern France named after the Aveyron River.- History :Aveyron is one of the original 83 departments created during the French Revolution on 4 March 1790....
  
  : Entraygues-sur-Truyère
  Entraygues-sur-Truyère
  Entraygues-sur-Truyère is a commune in the Aveyron department in southern France.-Geography:The village is located from Paris and from Toulouse.-Population:-Transportation:...
  
  

The Truyère flows into the Lot River

Lot River

The Lot, , originally the Olt , is a river in France, right tributary of the Garonne. It rises in the Cévennes, flowing west through Quercy, where it flows into the Garonne near Aiguillon, a total distance of...

 in Entraygues-sur-Truyère

Entraygues-sur-Truyère

Entraygues-sur-Truyère is a commune in the Aveyron department in southern France.-Geography:The village is located from Paris and from Toulouse.-Population:-Transportation:...

. Its main tributary (left) is the Bès River near Albaret-le-Comtal

Albaret-le-Comtal

Albaret-le-Comtal is a commune in the Lozère department in southern France. The village lies at the foot of a hydroelectric plant. The plant was built between 1916 and 1919 to supply energy to the hydrometallurgic factory at nearby Saint-Chély-du-Tarn....

.

The Truyère feeds several reservoir

Reservoir

A reservoir , artificial lake or dam is used to store water.Reservoirs may be created in river valleys by the construction of a dam or may be built by excavation in the ground or by conventional construction techniques such as brickwork or cast concrete.The term reservoir may also be used to...

s, like the Lac de Grandval

Lac de Grandval

Lac de Grandval is a lake in Cantal, France. At an elevation of 742 m, its surface area is 11 km².The lake lies in the communes of Alleuze, Faverolles and Fridefont; at its western end is the hydroelectric dam, between Lavastrie and Fridefont....

, to supply hydroelectricity

Hydroelectricity

Hydroelectricity is the term referring to electricity generated by hydropower; the production of electrical power through the use of the gravitational force of falling or flowing water. It is the most widely used form of renewable energy...

.

The Garabit Viaduct

Garabit viaduct

The Garabit Viaduct is a railway arch bridge spanning the Truyère river near Ruynes-en-Margeride , Cantal, France, in the mountainous Massif Central region. The bridge was constructed between 1880 and 1884 by Gustave Eiffel, with structural engineering by Maurice Koechlin, and was opened in 1885...

, built by Gustave Eiffel

Gustave Eiffel

Alexandre Gustave Eiffel was a French structural engineer from the École Centrale Paris, an architect, an entrepreneur and a specialist of metallic structures...

, spans the Truyère near Ruynes-en-Margeride

Ruynes-en-Margeride

Ruynes-en-Margeride is a commune in the Cantal department in south-central France.-Population:-References:*...

.