The Tronto () is a long

Italian Italian(s) may refer to: * Anything of, from, or related to the people of Italy over the centuries ** Italians, a Romance ethnic group related to or simply a citizen of the Italian Republic or Italian Kingdom ** Italian language, a Romance languag ...

river that arises at

Monti della Laga Monti della Laga is a mountain range A mountain range or hill range is a series of mountains or hills arranged in a line and connected by high ground. A mountain system or mountain belt is a group of mountain ranges with similarity in form ...

and ends in the

Adriatic Sea The Adriatic Sea () is a body of water separating the Italian Peninsula from the Balkans, Balkan Peninsula. The Adriatic is the northernmost arm of the Mediterranean Sea, extending from the Strait of Otranto (where it connects to the Ionian Se ...

Porto d'Ascoli Porto d'Ascoli (Ascoli's Harbour) is a modern residential district of San Benedetto del Tronto in the Province of Ascoli Piceno, Marche region. History It commemorates in its name the building of a port, in 1245, at the end of Tronto river, bui ...

, San Benedetto del Tronto. It traverses the

Lazio Lazio ( , ; ) or Latium ( , ; from Latium, the original Latin name, ) is one of the 20 Regions of Italy, administrative regions of Italy. Situated in the Central Italy, central peninsular section of the country, it has 5,714,882 inhabitants an ...

Marche Marche ( ; ), in English sometimes referred to as the Marches ( ) from the Italian name of the region (Le Marche), is one of the Regions of Italy, twenty regions of Italy. The region is located in the Central Italy, central area of the country, ...

, and

Abruzzo Abruzzo (, ; ; , ''Abbrìzze'' or ''Abbrèzze'' ; ), historically also known as Abruzzi, is a Regions of Italy, region of Southern Italy with an area of 10,763 square km (4,156 sq mi) and a population of 1.3 million. It is divided into four ...

regions of Italy. The source of the Tronto is in the

mountain range in the

province of Rieti The province of Rieti () is a Provinces of Italy, province in the Lazio region of Italy. Its capital is the city of Rieti. Established in 1927, it has an area of with a total population of 157,887 people as of 2017. There are 73 ''comuni'' (: '' ...

. Monte Gorzano is north of the source of the river and Lake Campotosto is south of the source of the river. The source of the river is near the place where the provinces of Rieti,

Teramo Teramo (; ) is a city and ''comune'' in the Italian region of Abruzzo, the capital of the province of Teramo. The city, from Rome, is situated between the highest mountains of the Apennines ( Gran Sasso d'Italia) and the Adriatic coast. Th ...

, and

L'Aquila L'Aquila ( ; ; ) is a city and ''comune'' in central Italy. It is the capital city of the Province of L'Aquila and the Abruzzo region in Italy. , it has a population of 69,902. Laid out within medieval walls on a hill in the wide valley of the A ...

meet. From its source in the Monti della Laga mountains, the Tronto flows northwest near Amatrice and Lago di Scandarello and crosses the border into the

province of Ascoli Piceno The province of Ascoli Piceno () is a province in the Marche region of Italy. Its capital is the city of Ascoli Piceno, and the province is bordered by the Adriatic Sea to the east, the province of Fermo to the north, and it faces the regions ...

near Accumoli. From there, it flows northeast and flows past

Arquata del Tronto Arquata del Tronto is a ''comune'' (municipality) in the province of Ascoli Piceno, in the Italian region of Marche, located about from Ancona. It is the only European ''comune'' located partly within two natural parks: Gran Sasso national park ...

and then curves east and flows past

Acquasanta Terme Acquasanta Terme () is a ''comune A (; : , ) is an administrative division of Italy, roughly equivalent to a township or municipality. It is the third-level administrative division of Italy, after regions () and provinces (). The can also ...

. The river then flows northeast and curves east and flows past

Ascoli Piceno Ascoli Piceno (; ; ) is a (municipality) and capital of the province of Ascoli Piceno, in the Italy, Italian region of Marche. Geography The town lies at the confluence of the Tronto, River Tronto and the small Castellano (river), River Castell ...

, where it receives its largest tributary, the

Castellano Castellano may refer to: * Castilian (disambiguation) (Spanish: ''castellano'') ** Castile (historical region) * Spanish language, or Castilian (Spanish: ''castellano'') **Castilian Spanish * Castellano (surname), including a list of people with ...

. The river continues flowing east near Folignano and eventually forms the border between the provinces of Ascoli Piceno and Teramo near Sant'Egidio alla Vibrata and Castel di Lama. The river continues flowing east near Spinetoli, Monsampolo del Tronto, and

Colonnella Colonnella is a ''comune'' in the Province of Teramo in the Italian region Abruzzo of eastern Italy. It belongs to the Unione dei Comuni Città Territorio-Val Vibrata, an inter-municipal body that groups Colonnella with eleven neighboring towns. ...

and finally enters the Adriatic Sea by Martinsicuro and

References

Rivers of the Province of Ascoli Piceno Rivers of the Province of Rieti Rivers of the Province of Teramo Rivers of Italy Adriatic Italian coast basins {{Italy-river-stub