Valles (singular vallis) on Mars are similar to valleys on Earth. Some features that take this title may be better described as canyons or chasmata; see List of Chasmata on Mars. Coordinates are given as planetocentric latitude with east longitude.
| Name | Coordinates | Length (km) | Namesake | Notes |
|---|---|---|---|---|
| Abus Vallis | 58.0 | Classical name for Humber River | ||
| Al-Qahira Vallis | 555.0 | Word for "Mars" in Arabic | ||
| Allegheny Vallis | 200.0 | Allegheny River | ||
| Anio Valles | 36.5 | Classical name for Aniene River in Italy | ||
| Apsus Vallis | 120.0 | Classical name for Seman River in Albania | ||
| Arda Valles | 186.0 | Arda River | ||
| Ares Vallis | 1700.0 | Word for "Mars" in Greek: Άρης | Landing site of the Mars Pathfinder | |
| Arnus Vallis | 280.0 | Arno River | ||
| Asopus Vallis | 33.0 | Classical name for Boeotian Asopus river in Greece | ||
| Athabasca Valles | 285.0 | Athabasca River | Carved by water from Cerberus Fossae | |
| Auqakuh Vallis | 312.0 | Word for "Mars" in Quechua | ||
| Axius Valles | 349.0 | Classical name for Vardar River in Greece | ||
| Bahram Vallis | 302.0 | Word for "Mars" in Persian | ||
| Brazos Valles | 458.0 | Brazos River | ||
| Buvinda Vallis | 119.6 | Classical name for River Boyne in Ireland | ||
| Chico Valles | 450.0 | River in Argentina. | ||
| Clanis Valles | 58.0 | Classical name for Chiana River in Italy | ||
| Clasia Vallis | 125.0 | Classical river in Umbria, Italy | ||
| Clota Vallis | 112.0 | Ancient name for River Clyde in Scotland | ||
| Columbia Valles | 94.0 | Columbia River | ||
| Coogoon Valles | 300.0 | River in Australia | ||
| Cusus Valles | 249.0 | Classical name for Hron River in Slovakia | ||
| Daga Vallis | 70.0 | Dagā River in Burma | ||
| Dao Vallis | 816.0 | Word for "star" in Thai | ||
| Deva Vallis | 48.0 | Classical name for River Dee in Scotland | ||
| Dittaino Valles | 138.0 | Dittaino River | ||
| Doanus Vallis | 131.0 | Classical river shown in Ptolemy's map; possibly Mekong River | ||
| Drava Valles | 150.0 | Drava River | ||
| Drilon Vallis | 94.0 | Classical name for Drin River in Albania | ||
| Dubis Vallis | 37.0 | Classical name for Doubs River in France | ||
| Durius Valles | 223.0 | Classical name for Douro River in Portugal | ||
| Dzigai Vallis | 326.0 | Word for "valley" in Navajo | ||
| Elaver Vallis | 160.0 | Classical name for Allier River in France | ||
| Enipeus Vallis | 357.0 | Classical name for Enipeas River in Greece | ||
| Evros Vallis | 335.0 | Evros River | ||
| Frento Vallis | 277.0 | Classical name for Fortore River in Italy | ||
| Granicus Valles | 750.0 | Ancient name for the Biga Çayı, a river in Turkey | ||
| Grjotá Valles | 370.0 | River in Iceland | ||
| Harmakhis Vallis | 475.0 | Word for "Mars" in Ancient Egyptian | ||
| Hebrus Valles | 317.0 | Ancient name for the Maritsa, a river in Greece | ||
| Her Desher Vallis | 107.0 | Word for "Mars" in Egyptian | ||
| Hermus Vallis | 46.0 | Classical name for Gediz River in Turkey | ||
| Himera Valles | 160.0 | Classical name for Grande River in Italy | ||
| Hrad Vallis | 825.0 | Word for "Mars" in Armenian | ||
| Huo Hsing Vallis | 318.0 | Word for "Mars" in Chinese:火星/huǒxīng | ||
| Hypanis Valles | 231.0 | Classical name for Kuban River in Russia | ||
| Hypsas Vallis | 32.8 | Classical name for river in Sicily | ||
| Iberus Vallis | 80.2 | Classical name for Ebro River in Spain | ||
| Indus Vallis | 307.0 | Indus River | ||
| Isara Valles | 8.0 | Classical name for Oise River in France | ||
| Ituxi Vallis | 62.0 | Ituxi River in Brazil | ||
| Kasei Valles | 1780.0 | Word for "Mars" in Japanese: かせい | ||
| Labou Vallis | 222.0 | Word for "Mars" in French | ||
| Ladon Valles | 278.0 | Ladon River in Greece | ||
| Lethe Vallis | 225.0 | River Lethe | ||
| Licus Vallis | 219.1 | Ancient name for Lech River in Germany and Austria | ||
| Liris Valles | 613.0 | Ancient name for Liri River in Italy | ||
| Lobo Vallis | 102.0 | River in Ivory Coast | ||
| Locras Valles | 314.0 | Ancient name for river in Corsica mentioned by Ptolemy | ||
| Loire Valles | 720.0 | Loire River | ||
| Louros Valles | 517.0 | Louros River | ||
| Ma'adim Vallis | 825.0 | Word for "Mars" in Hebrew: מַאַדִים | ||
| Mad Vallis | 524.0 | Mad River | ||
| Maja Valles | 1516.0 | Word for "Mars" in Nepali | ||
| Mamers Valles | 1020.0 | Word for "Mars" in Oscan | ||
| Mangala Valles | 828.0 | Word for "Mars" in Sanskrit | ||
| Marikh Vallis | 1280.0 | Word for "Mars" in Malaysian | ||
| Valles Marineris | 3769.0 | Mariner 9 Space program | Largest known crevice in the solar system | |
| Marte Vallis | 1185.0 | Word for "Mars" in Spanish: martes | ||
| Matrona Vallis | 51.0 | Classical name for Marne River in France | ||
| Maumee Valles | 350.0 | Maumee River | ||
| Mawrth Vallis | 636.0 | Word for "Mars" in Welsh: Mawrth | ||
| Minio Vallis | 88.0 | Classical name for river in Italy | ||
| Morava Valles | 325.0 | Morava River | ||
| Mosa Vallis | 171.0 | Meuse River | ||
| Munda Vallis | 10.0 | Classical name for Mondego River in Portugal | ||
| Naktong Vallis | 494.0 | Nakdong River | ||
| Nanedi Valles | 508.0 | Word for "planet" in Sesotho | ||
| Naro Vallis | 393.0 | Ancient name for Neretva River in former Yugoslavia | ||
| Nestus Valles | 33.0 | Classical name for Nestos River in Macedonia (Greece) | ||
| Nia Vallis | 133.0 | Classical river name | Named used by Lowell for canal | |
| Nicer Vallis | 54.0 | Classical name for Neckar River in Germany | ||
| Niger Vallis | 333.0 | Niger River | ||
| Nirgal Vallis | 496.0 | Word for "Mars" in Babylonian | ||
| Ochus Valles | 104.0 | Classical name for Hari River in Turkmenistan | ||
| Oltis Valles | 173.0 | Ancient name for Lot River in France | ||
| Osuga Valles | 185.0 | Osuga River | ||
| Padus Vallis | 46.0 | Classical name for Po River in Italy | ||
| Pallacopas Vallis | 660.0 | Classical canal in Babylonia | Name used by Lowell for a canal | |
| Parana Valles | 350.0 | Paraná River | ||
| Patapsco Vallis | 153.0 | Patapsco River | ||
| Protva Valles | 260.0 | Protva River | ||
| Rahway Valles | 500.0 | Rahway River | ||
| Ravi Vallis | 205.5 | Ravi River | ||
| Ravius Valles | 233.0 | Classical name for river in Ireland | ||
| Reull Vallis | 945.0 | Word for "planet" in Gaelic | ||
| Rhabon Valles | 247.0 | Classical name for Jiu River in Romania | ||
| Rubicon Valles | 240.0 | Ancient name for Rubicon River in Italy | ||
| Runa Vallis | 39.2 | Name proposed by Soviets | ||
| Sabis Vallis | 206.0 | Classical name for Sambre River in France and Belgium | ||
| Sabrina Vallis | 237.0 | Classical name for River Severn in England | ||
| Samara Valles | 615.0 | Ancient name for Somme River in France | ||
| Scamander Vallis | 204.0 | Ancient name for Karamenderes River in Turkey | ||
| Senus Vallis | 20.0 | Classical name for river in Ireland | ||
| Sepik Vallis | 56.0 | Sepik River | ||
| Shalbatana Vallis | 963.0 | Word for "Mars" in Akkadian | ||
| Silinka Vallis | 140.0 | River in Russia | ||
| Simud Valles | 945.0 | Word for "Mars" in Sumerian | ||
| Stura Vallis | 75.0 | Classical name for Stura di Demonte river in Italy | ||
| Subur Vallis | 26.0 | Classical name for river in Mauritania | ||
| Sungari Vallis | 430.0 | Songhua River | ||
| Surinda Valles | 95.0 | Name proposed by Soviets; found on Mars 5 map | ||
| Surius Vallis | 570.0 | From a river of Colchis | Name used by Lowell for canal | |
| Tader Valles | 200.0 | Ancient name for Segura River in Spain | ||
| Tagus Valles | 155.4 | Tagus River | ||
| Taus Vallis | 12.6 | Classical name for river in Scotland | ||
| Termes Vallis | 48.0 | Classical name for Tormes River in Spain | ||
| Teviot Vallis | 140.0 | River Teviot | ||
| Tigre Valles | 118 | Tigre River | ||
| Tinia Valles | 18.7 | Classical name for river in Italy | ||
| Tinjar Valles | 425.0 | Tinjar River in Malaysia | ||
| Tinto Vallis | 146.5 | Rio Tinto | ||
| Tisia Valles | 399.0 | Ancient name for Tisza River in Ukraine | ||
| Tiu Valles | 1720.0 | Word for "Mars" in Old English: tiu | ||
| Trebia Valles | 183.0 | Classical name for Trebbia River in Italy | ||
| Tyras Vallis | 68.0 | Classical name for Dniester River in Ukraine | ||
| Uzboi Vallis | 366.0 | Dry riverbed of the Uzboy River in Turkmenistan | ||
| Varus Valles | 92.0 | Classical name for Var River in France | ||
| Vedra Valles | 115.0 | Ancient name for river in Great Britain | ||
| Verde Vallis | 95.0 | Verde River | ||
| Vichada Valles | 430.0 | Vichada River | ||
| Vistula Valles | 190.0 | Vistula River in Poland | ||
| Waikato Vallis | 230.0 | Waikato River | ||
| Walla Walla Vallis | 24.0 | Walla Walla River | ||
| Warrego Valles | 188.0 | Warrego River | ||
| Zarqa Valles | 490 | Zarqa River |
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