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