Orcia

Orcia
The Orcia river at Sant'Angelo Scalo
Location
Country	Italy
Region	Tuscany
Municipalities	Radicofani, Sarteano, Pienza, San Quirico d'Orcia, Castiglione d'Orcia, Montalcino, Castel del Piano, Cinigiano
Physical characteristics
Source	Poggio Gello (Monte Cetona)
• location	Radicofani, Tuscany, Italy
• coordinates	42°54′46.25″N11°50′57.42″E / 42.9128472°N 11.8492833°E / 42.9128472; 11.8492833
Mouth	Ombrone
• location	Monte Antico, Tuscany, italy
• coordinates	42°58′14.79″N11°21′4.89″E / 42.9707750°N 11.3513583°E / 42.9707750; 11.3513583
Length	57 km [1]
Basin size	798 km² [1]
Basin features
Progression	Ombrone → Tyrrhenian Sea

The Orcia is a river in southern Tuscany, Italy, and a major tributary of the Ombrone River. It originates on Poggio Gello on Monte Cetona, in the municipality of Radicofani, and flows from east to west through the Val d'Orcia, a cultural landscape recognised as a UNESCO World Heritage Site.

The river traverses the municipalities of Radicofani, Sarteano, Pienza, San Quirico d'Orcia, Castiglione d'Orcia, and Montalcino in the province of Siena, as well as Castel del Piano and Cinigiano in the province of Grosseto, before joining the Ombrone near Monte Antico. ^[2]

References

1. Bertoli, Gabriele; Arrighi, Chiara; Caporali, Enrica (July 2024). "Flood exposure of environmental assets" (PDF). Natural Hazards and Earth System Sciences. p. 8.
2. Pistoi, Marco (1997). Guida archeologica della Val d'Orcia. DonChisciotte.