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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. Large valles are named for the words for "Mars" or "star" in various languages, while small ones are named for rivers.
| Name | Coordinates | Length (km) | Namesake | Notes |
|---|---|---|---|---|
| Abus Vallis | 5.54°S 212.7°E | 58.0 | Classical name for Humber River | |
| Al-Qahira Vallis | 18.21°S 162.5°E | 555.0 | Word for "Mars" in Arabic | |
| Allegheny Vallis | 9.1°S 306.0°E | 200.0 | Allegheny River | |
| Anio Valles | 37.78°N 55.9°E | 36.5 | Classical name for Aniene River in Italy | |
| Apsus Vallis | 34.79°N 135.0°E | 120.0 | Classical name for Seman River in Albania | |
| Arda Valles | 20.59°S 327.7°E | 186.0 | Arda River | |
| Ares Vallis | 10.29°N 334.2°E | 1700.0 | Word for "Mars" in Greek: Άρης | Landing site of the Mars Pathfinder |
| Arnus Vallis | 13.95°N 72.5°E | 280.0 | Arno River | |
| Asopus Vallis | 4.35°S 210.3°E | 33.0 | Classical name for Boeotian Asopus river in Greece | |
| Athabasca Valles | 8.5°N 155.0°E | 285.0 | Athabasca River | Carved by water from Cerberus Fossae |
| Auqakuh Vallis | 30.12°N 60.1°E | 312.0 | Word for "Mars" in Quechua | |
| Axius Valles | 55.7°S 70.1°E | 349.0 | Classical name for Vardar River in Greece | |
| Bahram Vallis | 20.49°N 302.5°E | 246.9 | Word for "Mars" in Persian | |
| Bashkaus Valles | 25.7°S 356.7°E | 302.0 | Bashkaus River | |
| Brazos Valles | 6.23°S 18.9°E | 458.0 | Brazos River | |
| Buvinda Vallis | 33.1°N 151.9°E | 119.6 | Classical name for River Boyne in Ireland | |
| Chico Valles | 66.77°S 206.5°E | 450.0 | River in Argentina. | |
| Clanis Valles | 33.2°N 58.4°E | 58.0 | Classical name for the river Chiani in Italy | |
| Clasia Vallis | 33.8°N 56.9°E | 125.0 | Classical river in Umbria, Italy | |
| Clota Vallis | 25.55°S 339.4°E | 112.0 | Ancient name for River Clyde in Scotland | |
| Columbia Valles | 9.42°S 317.08°E | 94.0 | Columbia River | |
| Coogoon Valles | 17.12°S 338.1°E | 300.0 | River in Australia | |
| Cusus Valles | 14.34°N 50.5°E | 249.0 | Classical name for Hron River in Slovakia | |
| Daga Vallis | 11.99°S 317.62°E | 70.0 | Dagā River in Burma | |
| Dao Vallis | 38.38°S 87.9°E | 816.0 | Word for "star" in Thai | |
| Deva Vallis | 7.61°S 203.0°E | 48.0 | Classical name for River Dee in Scotland | |
| Dittaino Valles | 1.48°S 293.0°E | 138.0 | Dittaino River | |
| Doanus Vallis | 63.04°S 334.4°E | 131.0 | Classical river shown in Ptolemy's map; possibly Mekong River | |
| Drava Valles | 48.68°S 166.3°E | 150.0 | Drava River | |
| Drilon Vallis | 7.22°N 307.6°E | 94.0 | Classical name for Drin River in Albania | |
| Dubis Vallis | 5.24°S 211.8°E | 37.0 | Classical name for Doubs River in France | |
| Dulce Vallis | 4.8°S 136.5°E | 32.5 | Dulce River | |
| Durius Valles | 17.41°S 172.1°E | 223.0 | Classical name for Douro River in Portugal | |
| Dzigai Vallis | 58.51°S 323.4°E | 326.0 | Word for "valley" in Navajo | |
| Elaver Vallis | 9.39°S 310.5°E | 160.0 | Classical name for Allier River in France | |
| Enipeus Vallis | 36.69°N 266.9°E | 357.0 | Classical name for Enipeas River in Greece | |
| Evros Vallis | 12.56°S 13.9°E | 335.0 | Evros River | |
| Frento Vallis | 49.98°S 345.5°E | 277.0 | Classical name for Fortore River in Italy | |
| Granicus Valles | 29.72°N 131.0°E | 750.0 | Ancient name for the Biga Çayı, a river in Turkey | |
| Grjotá Valles | 15.43°N 165.4°E | 370.0 | River in Iceland | |
| Harmakhis Vallis | 40.48°S 90.4°E | 475.0 | Word for "Mars" in Ancient Egyptian | |
| Havel Vallis | 0.8°N 302.5°E | 240.2 | Havel River | |
| Hebrus Valles | 19.99°N 126.6°E | 317.0 | Ancient name for the Maritsa, a river in Greece | |
| Her Desher Vallis | 25.15°S 312.0°E | 107.0 | Word for "Mars" in Egyptian Arabic | |
| Hermus Vallis | 5.34°S 212.0°E | 46.0 | Classical name for Gediz River in Turkey | |
| Himera Valles | 21.38°S 337.2°E | 160.0 | Classical name for Grande River in Italy | |
| Hrad Vallis | 38.38°N 135.3°E | 825.0 | Word for "Mars" in Armenian | |
| Huallaga Vallis | 26.7°S 79.1°E | 92.5 | Huallaga River | |
| Huo Hsing Vallis | 30.22°N 66.6°E | 318.0 | Word for "Mars" in Chinese:火星/huǒxīng | |
| Hypanis Valles | 9.49°N 313.3°E | 231.0 | Classical name for Kuban River in Russia | |
| Hypsas Vallis | 33.7°N 57.9°E | 32.8 | Classical name for river in Sicily | |
| Iberus Vallis | 21.28°N 152.0°E | 80.2 | Classical name for Ebro River in Spain | |
| Indus Vallis | 19.1°N 38.7°E | 307.0 | Indus River | |
| Isara Valles | 5.34°S 213.4°E | 8.0 | Classical name for Oise River in France | |
| Ituxi Vallis | 25.15°N 153.0°E | 62.0 | Ituxi River in Brazil | |
| Kārūn Valles | 35.9°S 174.1°E | 64.0 | Karun River | |
| Kasei Valles | 24.36°N 295.0°E | 1780.0 | Word for "Mars" in Japanese: かせい | |
| Labou Vallis | 8.6°S 205.5°E | 222.0 | Word for "Mars" in French | |
| Ladon Valles | 22.37°S 331.3°E | 278.0 | Ladon River in Greece | |
| Lethe Vallis | 3.96°N 153.5°E | 225.0 | River Lethe in Alaska | |
| Licus Vallis | 2.87°S 126.1°E | 219.1 | Ancient name for Lech River in Germany and Austria | |
| Liris Valles | 10.58°S 57.9°E | 613.0 | Ancient name for Liri River in Italy | |
| Lobo Vallis | 26.94°N 298.8°E | 102.0 | River in Ivory Coast | |
| Locras Valles | 8.6°N 47.7°E | 314.0 | Ancient name for river in Corsica mentioned by Ptolemy | |
| Loire Valles | 18.11°S 343.3°E | 720.0 | Loire River | |
| Louros Valles | 8.41°S 278.0°E | 517.0 | Louros River | |
| Ma'adim Vallis | 21.58°S 177.3°E | 825.0 | Word for "Mars" in Hebrew: מַאַדִים | |
| Mad Vallis | 56.2°S 76.1°E | 524.0 | Mad River | |
| Maja Valles | 12.46°N 301.7°E | 1516.0 | Word for "Mars" in Nepali | |
| Mamers Valles | 39.98°N 17.8°E | 1020.0 | Word for "Mars" in Oscan | |
| Mangala Valles | 11.47°S 209.0°E | 828.0 | Word for "Mars" in Sanskrit | |
| Marikh Vallis | 19.25°S 3.9°E | 1280.0 | Word for "Mars" in Malaysian | |
| Valles Marineris | 13.75°S 300.8°E | 3769.0 | Mariner 9 Space program | Largest known crevice in the solar system |
| Marte Vallis | 14.84°N 183.5°E | 1185.0 | Word for "Mars" in Spanish: marte | |
| Matrona Vallis | 7.61°S 176.1°E | 51.0 | Classical name for Marne River in France | |
| Maumee Valles | 19.49°N 306.8°E | 350.0 | Maumee River | |
| Mawrth Vallis | 22.37°N 343.5°E | 636.0 | Word for "Mars" in Welsh: Mawrth | |
| Minio Vallis | 4.25°S 208.2°E | 88.0 | Classical name for river in Italy | |
| Moa Valles | 35.6°N 305.3°E | 265.0 | Moa River | |
| Morava Valles | 13.29°S 335.55°E | 325.0 | Morava River | |
| Mosa Vallis | 14.74°S 22.2°E | 171.0 | Meuse River | |
| Munda Vallis | 5.44°S 213.7°E | 10.0 | Classical name for Mondego River in Portugal | |
| Naktong Vallis | 5.24°N 32.9°E | 494.0 | Nakdong River | |
| Nanedi Valles | 4.85°N 311.0°E | 508.0 | Word for "planet" in Sesotho | |
| Napo Vallis | 26.0°S 78.0°E | 87.5 | Napo River | |
| Neretva Vallis | 18.55°S 77.2°E | 17 | Named after the Neretva River in Bosnia and Herzegovina[1][2] | |
| Nestus Valles | 7.12°S 201.4°E | 33.0 | Classical name for Nestos River in Macedonia (Greece) | |
| Nia Vallis | 53.79°S 325.3°E | 133.0 | Classical river name | Named used by Lowell for canal |
| Nicer Vallis | 7.22°S 201.8°E | 54.0 | Classical name for Neckar River in Germany | |
| Niger Vallis | 35.09°S 92.2°E | 333.0 | Niger River | |
| Nirgal Vallis | 28.13°S 318.0°E | 496.0 | Word for "Mars" in Babylonian | |
| Ochus Valles | 7.12°N 314.9°E | 104.0 | Classical name for Hari River in Turkmenistan | |
| Okavango Valles | 38.1°N 9.0°E | 285.1 | Okavango River | |
| Oltis Valles | 23.66°S 338.3°E | 173.0 | Ancient name for Lot River in France | |
| Osuga Valles | 15.14°S 321.4°E | 185.0 | Osuga River | |
| Padus Vallis | 4.55°S 209.9°E | 46.0 | Classical name for Po River in Italy | |
| Pallacopas Vallis | 55.0°S 339.0°E | 660.0 | Classical canal in Babylonia | Name used by Lowell for a canal |
| Paraná Valles | 22.87°S 349.8°E | 350.0 | Paraná River | |
| Patapsco Vallis | 23.76°N 152.5°E | 153.0 | Patapsco River | |
| Peace Vallis | 4.21°S 137.23°E | 35.24 | "River in British Columbia and Alberta, Canada"[3] | |
| Pliva Vallis | 18.67°S 78.35°E | 30 | Named after the Pliva River in Bosnia and Herzegovina[1][2] | |
| Protva Valles | 28.92°S 299.4°E | 260.0 | Protva River | |
| Rahway Valles | 9.3°N 173.8°E | 500.0 | Rahway River | |
| Ravi Vallis | 0.2°S 319.3°E | 205.5 | Ravi River | |
| Ravius Valles | 46.18°N 248.7°E | 233.0 | Classical name for river in Ireland | |
| Reull Vallis | 42.28°S 104.1°E | 945.0 | Word for "planet" in Gaelic | |
| Rhabon Valles | 21.18°N 268.5°E | 247.0 | Classical name for Jiu River in Romania | |
| Rubicon Valles | 44.68°N 243.0°E | 240.0 | Ancient name for Rubicon River in Italy | |
| Runa Vallis | 28.43°S 323.2°E | 39.2 | Name proposed by Soviets | |
| Sabis Vallis | 5.24°S 207.5°E | 206.0 | Classical name for Sambre River in France and Belgium | |
| Sabrina Vallis | 11.08°N 311.0°E | 237.0 | Classical name for River Severn in England | |
| Sakarya Vallis | 5.10°S 137.3°E | 26.0 | Classical name for Sakarya River in Turkey | |
| Samara Valles | 24.85°S 340.9°E | 615.0 | Ancient name for Somme River in France | |
| Scamander Vallis | 15.83°N 28.5°E | 204.0 | Ancient name for Karamenderes River in Turkey | |
| Senus Vallis | 5.24°S 213.0°E | 20.0 | Classical name for river in Ireland | |
| Sepik Vallis | 0.89°S 294.2°E | 56.0 | Sepik River | |
| Shalbatana Vallis | 7.71°N 317.9°E | 963.0 | Word for "Mars" in Akkadian | |
| Silinka Vallis | 8.9°N 331.8°E | 140.0 | River in Russia | |
| Simud Valles | 19.59°N 322.2°E | 945.0 | Word for "Mars" in Sumerian | |
| Stura Vallis | 22.67°N 142.4°E | 75.0 | Classical name for Stura di Demonte river in Italy | |
| Subur Vallis | 11.67°N 306.8°E | 26.0 | Classical name for river in Mauritania | |
| Sungari Vallis | 40.03°S 88.84°E | 430.0 | Songhua River | |
| Surinda Valles | 28.92°S 324.9°E | 95.0 | Name proposed by Soviets; found on Mars 5 map | |
| Surius Vallis | 61.53°S 311.6°E | 570.0 | From a river of Colchis | Name used by Lowell for canal |
| Tader Valles | 48.78°S 207.5°E | 200.0 | Ancient name for Segura River in Spain | |
| Tagus Valles | 6.72°S 114.4°E | 155.4 | Tagus River | |
| Tana Vallis | 4.8°S 332.1°E | 56.5 | Tana River | |
| Taus Vallis | 4.85°S 211.5°E | 12.6 | Classical name for river in Scotland | |
| Termes Vallis | 11.08°S 202.9°E | 48.0 | Classical name for Tormes River in Spain | |
| Teviot Vallis | 43.38°S 102.1°E | 140.0 | River Teviot | |
| Tigre Valles | 11.88°S 322.88°E | 118 | Tigre River | |
| Tinia Valles | 4.65°S 211.0°E | 18.7 | Classical name for river in Italy | |
| Tinjar Valles | 37.69°N 124.2°E | 425.0 | Tinjar River in Malaysia | |
| Tinto Vallis | 3.96°S 111.4°E | 146.5 | Rio Tinto | |
| Tisia Valles | 11.77°S 45.7°E | 399.0 | Ancient name for Tisza River in Hungary | |
| Tiu Valles | 15.73°N 324.3°E | 1720.0 | Word for "Mars" in Old English: tiu | |
| Trebia Valles | 32.11°N 150.0°E | 183.0 | Classical name for Trebbia River in Italy | |
| Tyras Vallis | 8.31°N 309.8°E | 68.0 | Classical name for Dniester River in Ukraine | |
| Una Vallis | 18.29°S 77.07°E | 5 | Named after the Una River in Bosnia and Herzegovina[1][2] | |
| Uzboi Vallis | 29.52°S 322.9°E | 366.0 | Dry riverbed of the Uzboy River in Turkmenistan | |
| Varus Valles | 8.6°S 203.8°E | 92.0 | Classical name for Var River in France | |
| Vedra Valles | 19.2°N 304.4°E | 115.0 | Ancient name for river in Great Britain | |
| Verde Vallis | 0.49°S 29.8°E | 95.0 | Verde River | |
| Vichada Valles | 19.4°S 88.1°E | 430.0 | Vichada River | |
| Vistula Valles | 13.55°N 308.1°E | 190.0 | Vistula River in Poland | |
| Waikato Vallis | 33.2°S 113.81°E | 230.0 | Waikato River | |
| Walla Walla Vallis | 9.79°S 305.5°E | 24.0 | Walla Walla River | |
| Warrego Valles | 41.88°S 267.0°E | 188.0 | Warrego River | |
| Zarqa Valles | 0.16°N 80.82°E | 490 | Zarqa River |
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