River
Gers
175 km from source to mouth · France.
FranceFlows into Garonne
In numbers
Length
175km
Average flow
720m³/s
Basin
1,700km²
Drop
446m
from 489 m to 43 m
Country
1
The journey
From source to mouth
175 km of river and 30 stops on the way: 30 towns and cities on its banks, dams, bridges and the tributaries that feed it.
- 0 kmCanal de la Nesteat 489 m
- 28 kmSaint-Gaudens12,193 people
- 55 kmCazères3,769 people
- 65 kmCarbonne4,215 people
- 79 kmEaunes3,831 people
- 81 kmMuret24,313 people
- 84 kmSeysses6,466 people
- 84 kmFrouzins6,418 people
- 85 kmVilleneuve-Tolosane9,258 people
- 86 kmRoquettes3,714 people
- 86 kmRoques5,436 people
- 89 kmPortet-sur-Garonne9,794 people
- 92 kmRamonville-Saint-Agne12,573 people
- 96 kmToulouse511,684 people
- 99 kmBlagnac24,263 people
- 101 kmAucamville6,202 people
- 102 kmSaint-Alban5,379 people
- 102 kmFenouillet4,504 people
- 103 kmBeauzelle6,043 people
- 108 kmSaint-Jory4,564 people
- 110 kmMerville3,152 people
- 112 kmCastelnau-d'Estrétefonds3,155 people
- 115 kmGrenade6,486 people
- 118 kmGrisolles3,119 people
- 123 kmVerdun-sur-Garonne3,269 people
- 131 kmMontech3,743 people
- 142 kmCastelsarrasin13,260 people
- 157 kmValence5,039 people
- 172 kmBon-Encontre6,076 people
- 173 kmLayrac3,400 people
- 175 kmBoé4,746 people
- 175 kmGaronneat 43 m
Water level along the river (RiverATLAS; the height is exaggerated). Towns: GeoNames and Wikidata; bridges, dams and tributaries: Wikidata.
River in France
At the mouth it carries 717 m³/s on average: an Olympic pool every 3.5 seconds. It drops from 489 m to 43 m, 2.5 m per kilometre on average. Its basin covers 1,700 km², about the size of GP. 2.4 million people live in it. Highest water: from December to February. Its dams hold back little of its water (5.1% of a year's flow).
Where to start
- ToulouseLargest city on its banks · 511,684 people
- Toulouse-Blagnac Airport (TLS)Nearest airport with scheduled flights, 7 km from the cityCar hire at TLS airport (Toulouse/Blagnac)Discover Cars · Affiliate link↗
- On the water25 ferry piers, marinas, boat rentals and boat ramps along the river (OpenStreetMap)
- From May to SeptemberThe best months to visit
Gers, month by month
Highest water: from December to February
Best months to visit: from May to September.
From about 110 m³/s in the lowest month to 550 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
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The basin
Gers: the basin in numbers
34,205 km² of land send their water to this river. This is what lives on it.
- 2.4millionpeople live in the basin
- 71/km²people per km²
- 538maverage altitude of the basin
- 821mmof rain a year (basin average)
- 11.1°Caverage air temperature
- 27%protected areas
- 0.2%covered by lakes
- 0.6km³held in reservoirs
What covers the basin
- 32% Forest
- 42% Cropland
- 15% Pasture
- 3% 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
Gers: what you find on the way
- 68WeirsLa Cavaletade, Seuil du Ramier, Chaussée du Bazacle and 65 more
- 58LocksÉcluse Saint-Michel, Canal du Midi, Écluse Saint-Pierre and 55 more
- 3Waterfalls
- 14Boat ramps
- 2Ferry piers
- 9MarinasPort Saint-Sauveur, Port Jacques-Yves Cousteau, Halte nautique de Castelsarrasin and 6 more
- 3River beachesLe 15, Garonne Plage, Le Ponton
From OpenStreetMap, within 2.1 km of the river. Not mapped is not the same as not there.
Cross-checked with our atlases
Gers 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.
3mountains at the sourcePeakyas
Mountains at the source (3)
Within 15 km of the source, by Peakyas
- Montagne d'Arielle13 km away
- Montagne de Serre-Sèque13 km away
- Mont Castéra15 km away
From space
The source and the mouth, seen from orbit
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
Gers in pictures
Tributaries
Where it flows, and what flows into it
It flows into
GaronneFrance647 km660 m³/sTributaries (7)
Also: Arçon, Ruisseau l'Auchie, Aulouste, Cédon, Lauze, Sousson, Talouch
Nearby
Rivers nearby
Where these numbers come from
| Name, length, places | Wikidata (Q836299) · CC0 |
|---|---|
| Course, profile, basin | RiverATLAS v1.0 (HydroATLAS, Linke et al. 2019) · CC BY 4.0 — followed from the source to the mouth given by Wikidata |
| Flow | WaterGAP (RiverATLAS), 1971–2000 · CC BY 4.0 |
| Climate along the river | WorldClim (RiverATLAS), 1970–2000 · CC BY 4.0 |
| Towns, bridges, dams | Wikidata · CC0; GeoNames · CC BY 4.0 |
| Along the river | © OpenStreetMap contributors · ODbL |
| Images | EOX Sentinel-2 cloudless 2016 · CC BY 4.0; Wikimedia Commons |
| Our other atlases | 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?
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