The Tronto ( la, Truentus) is a long

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

river that arises at

Monti della Laga Monti della Laga is a mountain range in the central Apennines of Italy. Their ruggedness and inaccessibility makes them one of the lesser known areas of the Italian peninsula. Geography The mountains run for a length of about between the Italia ...

and ends in the

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

Porto d'Ascoli Porto d'Ascoli (Ascoli's Harbour) is a modern residential quarter 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, buil ...

San Benedetto del Tronto San Benedetto del Tronto is a city and ''comune'' in Marche, Italy. Part of an urban area with 100,000 inhabitants, it is one of the most densely populated areas along the Adriatic Sea coast. It is the most populated city in Province of Ascoli Pi ...

. It traverses the

Lazio it, Laziale , population_note = , population_blank1_title = , population_blank1 = , demographics_type1 = , demographics1_footnotes = , demographics1_title1 = , demographics1_info1 = , demographics1_title2 ...

Marche Marche ( , ) is one of the twenty regions of Italy. In English, the region is sometimes referred to as The Marches ( ). The region is located in the central area of the country, bordered by Emilia-Romagna and the republic of San Marino to the ...

, and

Abruzzo Abruzzo (, , ; nap, label=Neapolitan language, Abruzzese Neapolitan, Abbrùzze , ''Abbrìzze'' or ''Abbrèzze'' ; nap, label=Sabino dialect, Aquilano, Abbrùzzu; #History, historically Abruzzi) is a Regions of Italy, region of Southern Italy wi ...

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

mountain range in the

province of Rieti The Province of Rieti ( it, Provincia di Rieti) is a 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 Monte Gorzano is the highest peak in the Monti della Laga, in northern Abruzzo, central Italy. It has an elevation of and is also the highest peak of Lazio. It is located on the boundary with the provinces of Teramo in the Abruzzo region and ...

is north of the source of the river and

Lake Campotosto Lago di Campotosto ("Toughfield Lake") is an artificial lake in Abruzzo, Italy. The reservoir is located at an elevation of 1,313 m and comprises an area of 14 square kilometres. It is located in the natural park known as the "Gran Sasso e Mo ...

is south of the source of the river. The source of the river is near the place where the provinces of Rieti,

Teramo Teramo (; nap, label= Abruzzese, Tèreme ) 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'Itali ...

, and

L'Aquila L'Aquila ( , ) is a city and ''comune'' in central Italy. It is the capital city of both the Abruzzo region and of the Province of L'Aquila. , it has a population of 70,967 inhabitants. Laid out within medieval walls on a hill in the wide valle ...

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 ( it, Provincia di 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 nor ...

near

Accumoli Accumoli is a ''comune'' (municipality) in the Province of Rieti in the Italian region Lazio, located about northeast of Rome and about northeast of Rieti. It is located in the natural park known as the " Gran Sasso e Monti della Laga National P ...

. 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 Marche region of Italy, located about from Ancona. It is the only European municipality located partly within two natural parks: Gran Sasso e Monti della Lag ...

and then curves east and flows past

Acquasanta Terme Acquasanta Terme ( la, Ad Aquas) is a ''comune'' (municipality) in the Province of Ascoli Piceno in the Italian region Marche, located about south of Ancona and about southwest of Ascoli Piceno. It is located in the Gran Sasso e Monti della Laga ...

. The river then flows northeast and curves east and flows past Ascoli Piceno, where it receives its largest tributary, the

Castellano Castellano may refer to: * Castilian (disambiguation) (Spanish: ''castellano'') ** Castile (historical region) Castile or Castille (; ) is a territory of imprecise limits located in Spain. The invention of the concept of Castile relies on the ...

. The river continues flowing east near

Folignano Folignano is a ''comune'' (municipality) in the Province of Ascoli Piceno in the Italian region Marche, located about south of Ancona and about southeast of Ascoli Piceno. As of 31 December 2004, it had a population of 9,214 and an area of .All ...

and eventually forms the border between the provinces of Ascoli Piceno and Teramo near

Sant'Egidio alla Vibrata Sant'Egidio alla Vibrata ( Abruzzo: ') is a town and ''comune'' in province of Teramo, in the Abruzzo region of central Italy Italy ( it, Italia ), officially the Italian Republic, ) or the Republic of Italy, is a country in Southern Euro ...

and

Castel di Lama Castel di Lama is a ''comune'' (municipality) in the Province of Ascoli Piceno in the Italian region Marche, located about south of Ancona and about east of Ascoli Piceno. Castel di Lama borders the following municipalities: Appignano del Tront ...

. The river continues flowing east near

Spinetoli Spinetoli is a ''comune'' (municipality) in the Province of Ascoli Piceno in the Italian region Marche, located about south of Ancona and about east of Ascoli Piceno. As of 31 December 2004, it had a population of 6,351 and an area of .All demog ...

Monsampolo del Tronto Monsampolo del Tronto is a ''comune'' (municipality) in the Province of Ascoli Piceno in the Italian region Marche, located about south of Ancona and about southwest of Ascoli Piceno. Monsampolo del Tronto borders the following municipalities: ...

, and

Colonnella Colonnella is a ''comune'' in the Province of Teramo in the Italian region Abruzzo of eastern Italy. Geography The territory of Colonnella borders the following municipalities: Corropoli, Controguerra, Martinsicuro Martinsicuro ( la, Truentu ...

and finally enters the Adriatic Sea by

Martinsicuro Martinsicuro ( la, Truentum or ''Castrum Truentinum'') is a town and ''comune'' in province of Teramo, Abruzzo, central Italy. It is located on the right of the mouth of Tronto River. History Remains of a Bronze Age (10th-9th centuries BC) settle ...

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