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River

Segre

265 km from source to mouth · Spain and France.

SpainFranceSpain and FranceFlows into Ebro10th longest in Spain

Follow the riverMonth by month

SourceMouth
The river and every tributary in its basin, drawn from RiverATLAS (CC BY 4.0).

In numbers

Length

265km

Average flow

100m³/s

Basin

22,400km²

Drop

1,142m

from 1,211 m to 69 m

Countries

2

The journey

From source to mouth

265 km of river and 68 stops on the way: 47 towns and cities on its banks, dams, bridges and the tributaries that feed it.

1,211 m69 m
Lloat 1,211 m0 km
Riu Durantributary24 km
La Seu d'Urgell13,009 people62 km
Gran Valiratributary63 km
Oliana Reservoir2.1 km²101 km
Pantà de Rialb4.2 km²126 km
Pantà de Camarasa4.3 km²166 km
Sant Llorenç de Montgai reservoir0.8 km²175 km
Corbtributary203 km
Utxesa reservoir0.5 km²236 km
Ebroat 69 m265 km
0100200265 km
  1. 0 kmLloat 1,211 m
  2. 0 kmSaillagouse1,155 people
  3. 1 kmFrench Cerdagne13,665 people
  4. 1 kmLlívia1,562 people
  5. 7 kmBourg-Madame1,182 people
  6. 7 kmPuigcerdà10,035 people
  7. 12 kmCaroltributary
  8. 13 kmFontanals de Cerdanya516 people
  9. 15 kmBolvir493 people
  10. 16 kmGuils de Cerdanya557 people
  11. 17 kmGer501 people
  12. 19 kmIsòvol314 people
  13. 19 kmDas261 people
  14. 21 kmPrats i Sansor252 people
  15. 24 kmRiu Durantributary
  16. 27 kmBellver de Cerdanya2,289 people
  17. 31 kmPrullans270 people
  18. 35 kmMontellà i Martinet598 people
  19. 37 kmRiu de la Llosatributary
  20. 56 kmAlàs i Cerc320 people
  21. 62 kmLa Seu d'Urgell13,009 people
  22. 63 kmGran Valiratributary
  23. 65 kmMontferrer i Castellbò1,161 people
  24. 72 kmRibera d'Urgellet989 people
  25. 86 kmOrganyà853 people
  26. 90 kmColl de Nargó585 people
  27. 101 kmOliana Reservoir2.1 km²
  28. 105 kmOliana1,874 people
  29. 112 kmRibera Saladatributary
  30. 114 kmBassella216 people
  31. 125 kmEl Rialbtributary
  32. 126 kmPantà de Rialb4.2 km²
  33. 128 kmLa Baronia de Rialb216 people
  34. 130 kmPonts2,653 people
  35. 134 kmLlobregóstributary
  36. 148 kmArtesa de Segre3,559 people
  37. 166 kmNoguera Pallaresatributary
  38. 166 kmEl Boixtributary
  39. 166 kmPantà de Camarasa4.3 km²
  40. 170 kmCamarasa788 people
  41. 175 kmSant Llorenç de Montgai reservoir0.8 km²
  42. 176 kmOs de Balaguer1,088 people
  43. 183 kmSió rivertributary
  44. 184 kmBalaguer17,729 people
  45. 188 kmVallfogona de Balaguer2,009 people
  46. 195 kmTérmens1,350 people
  47. 196 kmMenàrguens798 people
  48. 199 kmTorrelameu788 people
  49. 200 kmVilanova de la Barca1,163 people
  50. 202 kmCorbins1,502 people
  51. 203 kmCorbtributary
  52. 206 kmAlcoletge3,640 people
  53. 208 kmNoguera Ribagorzanatributary
  54. 218 kmArroyo de la Femosatributary
  55. 221 kmAlbatàrrec2,331 people
  56. 223 kmMontoliu de Lleida488 people
  57. 224 kmSudanell915 people
  58. 227 kmSettributary
  59. 228 kmAlcarràs10,256 people
  60. 231 kmTorres de Segre2,317 people
  61. 233 kmSoses1,892 people
  62. 236 kmUtxesa reservoir0.5 km²
  63. 238 kmAitona2,591 people
  64. 245 kmSeròs1,954 people
  65. 248 kmMassalcoreig592 people
  66. 253 kmCinca Rivertributary
  67. 254 kmLa Granja d'Escarp994 people
  68. 261 kmMequinenza2,236 people
  69. 261 kmReservoir of Mequinenza48 km²
  70. 265 kmEbroat 69 m

Water level along the river (RiverATLAS; the height is exaggerated). Towns: GeoNames and Wikidata; bridges, dams and tributaries: Wikidata.

French-Spanish-Andorran river

At the mouth it carries 100 m³/s on average: an Olympic pool every 25 seconds. It drops from 1,211 m to 69 m, 4.3 m per kilometre on average. Its basin covers 22,400 km², about the size of BZ. 695,000 people live in it. Highest water: from May to June and from November to December. It is heavily dammed: reservoirs can hold 52% of a year's flow.

Read more on Wikipedia

Where to start

  • BalaguerLargest city on its banks · 17,729 people
  • Lleida-Alguaire Airport (ILD)Nearest airport with scheduled flights, 24 km from the cityCar hire at REU airport (Reus)Discover Cars · Affiliate link
  • On the water5 ferry piers, marinas, boat rentals and boat ramps along the river (OpenStreetMap)
  • From May to SeptemberThe best months to visit

Segre, month by month

Highest water: from May to June and from November to December

Best months to visit: from May to September.

200
4°35 mmJan
130
6°34 mmFeb
120
9°48 mmMar
180
11°56 mmApr
280
15°75 mmMay
290
19°68 mmJun
150
22°39 mmJul
74
22°58 mmAug
110
19°66 mmSep
220
13°58 mmOct
270
8°50 mmNov
270
5°46 mmDec
Water (estimated flow)Air (average) Rain (mm)Best months

From about 74 m³/s in the lowest month to 290 m³/s in the highest. An estimate: the monthly flow is modelled from the lowest and highest months of WaterGAP (RiverATLAS, 1971–2000) and the rain and snow along the river (WorldClim). Dams change the real rhythm. The chip is the average air temperature; below it, the month's rain.

Plan the trip

Plan the trip: boat trips, a bed by the river, a car

Car hire at REU airport (Reus)Discover CarsSee 

Some links above are affiliate links: if you book through them we may earn a commission, at no extra cost to you. It never changes what the data on this page says.

The basin

Segre: the basin in numbers

22,719 km² of land send their water to this river. This is what lives on it.

DammedReservoirs can hold 52% of a year's flow: much of the river is a chain of lakes.
  • 695,000people live in the basin
  • 31/km²people per km²
  • 912maverage altitude of the basin
  • 769mmof rain a year (basin average)
  • 10.2°Caverage air temperature
  • 23%protected areas
  • 0.4%covered by lakes
  • 3.0km³held in reservoirs

What covers the basin

  • 43% Forest
  • 36% Cropland
  • 15% Pasture
  • 1% Towns and cities

RiverATLAS (HydroATLAS v1.0, CC BY 4.0): land cover, people, protected areas, glaciers and dams over the whole basin upstream of the mouth.

Along the river

Segre: what you find on the way

  • 21DamsPresa del Rec del Solà, Presa del Canal d'Urgell, Presa de Camarasa and 18 more
  • 27WeirsPresa del Rec de l'Olla i Segalers, Presa del Salt de Seròs, Presa de Torres and 24 more
  • 1Locks
  • 5Waterfalls
  • 1Boat ramps
  • 3MarinasClub Capri Mequinensa, Embarcadero del Ebro / Embarcador de l'Ebre
  • 1Boat rentals

From OpenStreetMap, within 2.0 km of the river. Not mapped is not the same as not there.

Cross-checked with our atlases

Segre in our other atlases

What our sister atlases know about the waterfalls on this river, the lakes it flows through, the beaches at its mouth, the mountains where it rises and the islands off its mouth.

  • 6lakes on its wayLakeyas
  • 132mountains at the sourcePeakyas

Lakes and reservoirs (6)

Lakes it flows through, by Lakeyas

  1. Oliana Reservoirkm 942.1km²
  2. Pantà de Rialbkm 1164.2km²
  3. Pantà de Camarasakm 1534.3km²
  4. Sant Llorenç de Montgai reservoirkm 1610.8km²
  5. Utxesa reservoirkm 2180.5km²
  6. Reservoir of Mequinenzakm 241 · 60 m deep48km²

Lakeyas is coming soonOpen Lakeyas ↗

Mountains at the source (132)

Within 15 km of the source, by Peakyas

  1. Puigmal2.2 km away · prominence 1,331 m2,910m
  2. Bastiments11 km away · prominence 276 m2,881m
  3. Pic de Noufonts5.5 km away · prominence 210 m2,861m
  4. Pic del Segre1.2 km away · prominence 95 m2,843m
  5. Pic de l'Infern9.0 km away · prominence 164 m2,870m
  6. Pic de Finestrelles2.5 km away · prominence 221 m2,826m
  7. Pic d'Eina4.6 km away · prominence 57 m2,789m
  8. Pic de la Fossa del Gegant6.9 km away · prominence 84 m2,808m

124 more on PeakyasOpen Peakyas ↗

From space

The source and the mouth, seen from orbit

Segre: satellite view of the source
The source14 km across
Segre: satellite view of the mouth
The mouth21 km across

Sentinel-2 cloudless 2016 by EOX IT Services GmbH (contains modified Copernicus Sentinel data 2016), CC BY 4.0. The glowing line is the river as drawn by RiverATLAS.

Photos

Segre in pictures

Font de Segre - Llo
Alan Mattingly · CC0
01 El Segre, aigües avall d'Isòvol
Enfo · CC BY-SA 3.0
02 El Segre, aigües avall d'Isòvol
Enfo · CC BY-SA 3.0
Confluència del Llobregós amb el Segre
Jordiferrer · CC BY-SA 3.0

Tributaries

Where it flows, and what flows into it

It flows into

EbroSpainSpain910 km430 m³/s

Tributaries (26)

Cinca RiverSpainSpain170 km100 m³/sjoins at km 234Noguera PallaresaSpainSpain154 km37 m³/sjoins at km 153Gran ValiraSpainSpain44 km10 m³/sjoins at km 58

Also: Noguera Ribagorzana, Carol, El Rialb, riu d'Angostrina, Set, Corb, El Farfanya, Sió river, Ribera Salada, Llobregós, riu de Lavansa, Riu de la Llosa, Vanéra, riu de la Color, Arroyo de la Femosa, Riu de Cabó, El Boix, Rec de l'Angust, Riu Duran, Reür, Riera de Madrona, Alp River, río Aransa

In the same basin

AragónSpainSpain195 km41 m³/sJalón RiverSpainSpain224 km21 m³/sArgaSpainSpain145 km60 m³/sGállegoSpainSpain193 km34 m³/sGuadalopeSpainSpain160 km4.8 m³/s

Nearby

Rivers nearby

Cinca RiverSpainSpain170 km100 m³/s8 km awayGuadalopeSpainSpain160 km4.8 m³/s32 km awayNoguera PallaresaSpainSpain154 km37 m³/s77 km awayGállegoSpainSpain193 km34 m³/s102 km awayJalón RiverSpainSpain224 km21 m³/s135 km awayLlobregatSpainSpain175 km21 m³/s153 km awayGran ValiraSpainSpain44 km10 m³/s145 km awayBesòsSpainSpain18 km4.3 m³/s161 km away

Where these numbers come from

Name, length, placesWikidata (Q23145) · CC0
Course, profile, basinRiverATLAS v1.0 (HydroATLAS, Linke et al. 2019) · CC BY 4.0 — followed from the source to the mouth given by Wikidata
FlowWaterGAP (RiverATLAS), 1971–2000 · CC BY 4.0
Climate along the riverWorldClim (RiverATLAS), 1970–2000 · CC BY 4.0
Towns, bridges, damsWikidata · CC0; GeoNames · CC BY 4.0
Along the river© OpenStreetMap contributors · ODbL
ImagesEOX Sentinel-2 cloudless 2016 · CC BY 4.0; Wikimedia Commons
Our other atlasesLakeyas, Peakyas — Wikidata · CC0; © OpenStreetMap contributors · ODbL; GeoNames · CC BY 4.0; HydroLAKES · CC BY 4.0; NOAA OISST

Every source and licence is on the data sources page.

The family

Do you prefer beaches, lakes, mountains, waterfalls, islands, rivers or canyons?

Same idea, other landscapes: field atlases built on open data, month by month, in seven languages.

beachesCoastyaFind your beach: sea temperature, sun and swimming month by month.Visit
lakesLakeyasEvery lake on Earth: water temperature, ice, depth and the shore.Coming soonVisit
mountainsPeakyasEvery summit in 3D: summit weather, the 0 °C line, huts and trails.Visit
waterfallsCascadyasEvery waterfall: height, flow month by month and when it roars.Coming soonVisit
islandsIslandyasEvery island from the sea up: size, sea temperature, ferries and 3D.Coming soonVisit
riversRiveryasEvery river from source to sea: the journey, the flow and the basin in numbers.You are here
canyonsCanyonyasEvery canyon cut to scale: depth to the floor, rim and floor temperatures, trails and viewpoints.Coming soonVisit