River
Arachthos
110 km from source to mouth · Greece.
GreeceFlows into Ambracian Gulf8th longest in Greece
In numbers
Length
110km
Average flow
38m³/s
Basin
1,894km²
Drop
611m
from 609 m to -2 m
Country
1
The journey
From source to mouth
110 km of river and 14 stops on the way: 8 towns and cities on its banks, dams, bridges and the tributaries that feed it.
- 0 kmSourceat 609 m
- 12 kmIoannina Municipality112,486 people
- 26 kmPapastathis Bridge
- 41 kmPolitsa bridge
- 48 kmPlaka Bridge
- 48 kmPlaka37 people
- 48 kmPlaka Bailey bridge
- 83 kmPournari lake15 km²
- 84 kmPéta1,952 people
- 89 kmGrammenítsa1,258 people
- 90 kmÁrta21,895 people
- 91 kmEleoúsa1,093 people
- 92 kmBridge of Arta
- 93 kmAgia Triada149 people
- 103 kmNeochóri1,372 people
- 110 kmAmbracian Gulfat -2 m
Water level along the river (RiverATLAS; the height is exaggerated). Towns: GeoNames and Wikidata; bridges, dams and tributaries: Wikidata.
River in Epirus, Greece
At the mouth it carries 38 m³/s on average: an Olympic pool every 65 seconds. It drops from 609 m to -2 m, 5.6 m per kilometre on average. Its basin covers 1,894 km², about the size of GP. 47,000 people live in it. Highest water: from December to January; lowest: from June to September. It is heavily dammed: reservoirs can hold 60% of a year's flow.
Where to start
- Ioannina MunicipalityLargest city on its banks · 112,486 people
- Ioannina King Pyrrhus National Airport (IOA)Nearest airport with scheduled flights, 4 km from the cityCar hire at IOA airport (Ioannina)Discover Cars · Affiliate link↗
- On the water3 ferry piers, marinas, boat rentals and boat ramps along the river (OpenStreetMap)
- Kayak and canoe2 put-ins and rapids mapped (OpenStreetMap)
- From May to SeptemberThe best months to visit
Arachthos, month by month
Highest water: from December to January
Lowest water: from June to September. Best months to visit: from May to September.
From about 6.0 m³/s in the lowest month to 84 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
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
Arachthos: the basin in numbers
1,906 km² of land send their water to this river. This is what lives on it.
- 47,000people live in the basin
- 25/km²people per km²
- 823maverage altitude of the basin
- 989mmof rain a year (basin average)
- 11.6°Caverage air temperature
- 54%protected areas
- 0.8%covered by lakes
- 0.7km³held in reservoirs
What covers the basin
- 60% Forest
- 28% Cropland
- 12% 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
Arachthos: what you find on the way
- 4WaterfallsGoura waterfall, Klifki Falls, Kalentzi Falls and 1 more
- 2Canoe put-ins
- 2Boat ramps
From OpenStreetMap, within 1.4 km of the river. Not mapped is not the same as not there.
Cross-checked with our atlases
Arachthos 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.
1lake on its wayLakeyas
22mountains at the sourcePeakyas
4islands off the mouthIslandyas
Lakes and reservoirs (1)
Lakes it flows through, by Lakeyas
- Pournari lakekm 8415km²
Lakeyas is coming soonOpen Lakeyas ↗
Mountains at the source (22)
Within 15 km of the source, by Peakyas
- Lygkos15 km away2,177m
- Mauvrovouni, Grevena13 km away2,157m
- Mitsikeli14 km away1,810m
- Koziakos9.4 km away1,559m
- Dervo7.1 km away1,393m
- Grava9.8 km away1,349m
- Koukouroutzos10 km away
- Flampouro7.8 km away
14 more on PeakyasOpen Peakyas ↗
Islands off the mouth (4)
Within 30 km of the mouth, by Islandyas
- Koronisia10 km away12km²
- Koukoumitsa Aitoloakarnanias16 km away
- Vouvalos islet11 km away
- Kefalos16 km away
Islandyas is coming soonOpen Islandyas ↗
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.
Tributaries
Where it flows, and what flows into it
Tributaries (1)
Also: Kalarrytikos
Nearby
Rivers nearby
Greece58 km13 m³/s54 km awayAchelous RiverGreece217 km87 m³/s74 km awayAlfeiosGreece120 km45 m³/s161 km awayPineiosGreece216 km67 m³/s174 km awayVardarGreece388 km180 m³/s219 km awayHaliacmonGreece297 km56 m³/s213 km awayVjosa
Albania280 km150 m³/s233 km awayDevollAlbania196 km48 m³/s223 km awayWhere these numbers come from
| Name, length, places | Wikidata (Q624655) · CC0 |
|---|---|
| Course, profile, basin | RiverATLAS v1.0 (HydroATLAS, Linke et al. 2019) · CC BY 4.0 — followed along the river network from the point 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 | Lakeyas, Peakyas, Islandyas — 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.
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