{{Infobox river | name = Trionto | name_native = | name_native_lang = | name_other = Traeis | name_etymology = <!---------------------- IMAGE & MAP --> | image = Trionto valley Longubucco.jpg | image_size = | image_caption = The Trionto between Acri and Longobucco | map = | map_size = | map_caption = | pushpin_map = | pushpin_map_size = | pushpin_map_caption= <!---------------------- LOCATION --> | subdivision_type1 = Country | subdivision_name1 = Italy | subdivision_type2 = | subdivision_name2 = | subdivision_type3 = Region | subdivision_name3 = Calabria | subdivision_type4 = | subdivision_name4 = | subdivision_type5 = Cities | subdivision_name5 = Longobucco, Cropalati, Crosia <!---------------------- PHYSICAL CHARACTERISTICS --> | length_km = 40 | width_min = | width_avg = | width_max = | depth_min = | depth_avg = | depth_max = | discharge1_location= | discharge1_min = | discharge1_avg = {{convert|4.4|m3/s|cuft/s|abbr=on}} | discharge1_max = <!---------------------- BASIN FEATURES --> | source1 = | source1_location = Sila Mountains | source1_coordinates= | source1_elevation = | mouth = Gulf of Taranto | mouth_location = Pantano Martucci | mouth_coordinates = {{coord|39|37|29|N|16|45|25|E|display=inline,title}} | mouth_elevation = {{convert|0|m|abbr=on}} | progression = | river_system = | basin_size_km2 = 288 | tributaries_left = | tributaries_right = | custom_label = | custom_data = | extra = }}

The '''Trionto''' is a river in the Calabria region of southern Italy. It was known in ancient times as the '''Traeis'''.<ref name=barr /> It rises in the Sila Mountains and initially flows to the east but gradually changes direction to the north. It drains into the Gulf of Taranto at Pantano Martucci after a course of about 40&nbsp;kilometers. Its main tributaries are the La Manna, Macrocioli, Ortiano and Laurenzana. It has a drainage basin of {{convert|288|km2}}.<ref>[https://www.cfd.calabria.it/DatiVari/Bacini_Idrografici/schede%20bacini%20html/Trionto.htm Caratteristiche bacino e sottobacini. Trionto]</ref> Along its course it passes Longobucco, Cropalati and Crosia. The river is mainly seasonal. The ancient Greek city Sybaris on the Traeis was located near the course of the river, but its location has not been found.

==References== {{Reflist|refs= <ref name=barr>{{Barrington Atlas|map=46|notes=no}}</ref> }}

Category:Rivers of the Province of Cosenza Category:Rivers of Italy Category:Drainage basins of the Ionian Sea