River
Iijoki
370 km from source to mouth · Finland.
FinlandFlows into Bothnian Bay2nd longest in Finland
In numbers
Length
370km
Average flow
200m³/s
Basin
14,191km²
Drop
220m
from 225 m to 5 m
Country
1
The journey
From source to mouth
370 km of river and 44 stops on the way: 4 towns and cities on its banks, dams, bridges and the tributaries that feed it.
- 0 kmIijärviat 225 m
- 0 kmKallioluoma3.4 km²
- 3 kmAhvenlampi3.6 km²
- 6 kmRistilampi0.6 km²
- 9 kmSäynäjäluoma0.4 km²
- 11 kmVälijärvi0.4 km²
- 14 kmTakalojärvi0.7 km²
- 14 kmSiikaluoma0.4 km²
- 23 kmIijärvi20 km²
- 30 kmPoussunjärvi2.2 km²
- 32 kmLuokkajärvi1.1 km²
- 35 kmSoivionjärvi7.8 km²
- 38 kmRaakunjärvi1.8 km²
- 43 kmPikku Kero1.3 km²
- 49 kmSuulampi1.1 km²
- 74 kmSarvijärvi0.9 km²
- 74 kmIso Pajuluoma0.3 km²
- 75 kmValkeainen2.3 km²
- 76 kmLake Kero53 km²
- 81 kmRuntti0.4 km²
- 90 kmTurpeinen2.4 km²
- 93 kmUlkujärvi1.3 km²
- 99 kmTyrälampi1.2 km²
- 99 kmSäynäjälampi0.4 km²
- 106 kmJokijärvi6.3 km²
- 125 kmTaivalkoski3,624 people
- 148 kmJurmunlampi0.6 km²
- 179 kmPieni Haukijärvi0.5 km²
- 208 kmSotkajärvi2.1 km²
- 215 kmJongunjärvi25 km²
- 236 kmPieni-Kaakkuri5.2 km²
- 238 kmPudasjärvi7,226 people
- 246 kmYpykkäjärvi0.7 km²
- 247 kmLivojokitributary
- 248 kmIsojärvi0.8 km²
- 257 kmNaisjärvi4.2 km²
- 266 kmKieruajärvi1.5 km²
- 281 kmVantutlampi1.0 km²
- 320 kmSiuruanjokitributary
- 328 kmMaalismaa kraftverksdamm0.4 km²
- 336 kmJakkukylä suspension bridge
- 337 kmJakkukylä647 people
- 350 kmRaasaka kraftverksdamm2.8 km²
- 352 kmHelsinginkoski Pedestrian and Bicycle Bridge
- 353 kmIi9,800 people
- 370 kmBothnian Bayat 5 m
Water level along the river (RiverATLAS; the height is exaggerated). Towns: GeoNames and Wikidata; bridges, dams and tributaries: Wikidata.
River of Finland
At the mouth it carries 197 m³/s on average: an Olympic pool every 13 seconds. It drops from 225 m to 5 m, 0.6 m per kilometre on average. Its basin covers 14,191 km², about the size of ME. 41,000 people live in it. Highest water, with the snowmelt: from May to July; lowest: from January to April. No large dam holds it back: it is one of the world's free-flowing rivers.
Where to start
- IiLargest city on its banks · 9,800 people
- Oulu Airport (OUL)Nearest airport with scheduled flights, 43 km from the cityCar hire at OUL airport (Oulu / Oulunsalo)Discover Cars · Affiliate link↗
- On the water12 ferry piers, marinas, boat rentals and boat ramps along the river (OpenStreetMap)
- Kayak and canoe5 put-ins and rapids mapped (OpenStreetMap)
- From June to AugustThe best months to visit
Iijoki, month by month
Highest water: from May to July
Lowest water: from January to April. Freezing months (average below −4 °C): from November to March. Melting snow makes up much of its water. Best months to visit: from June to August.
From about 71 m³/s in the lowest month to 380 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
Iijoki: the basin in numbers
16,476 km² of land send their water to this river. This is what lives on it.
- 41,000people live in the basin
- 3/km²people per km²
- 183maverage altitude of the basin
- 547mmof rain a year (basin average)
- 0.3°Caverage air temperature
- 6%protected areas
- 5.1%covered by lakes
- 1%permafrost
What covers the basin
- 91% Forest
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
Iijoki: what you find on the way
- 7Weirs
- 5RapidsKurjenkoski, Alakoski, Pöykkiönniva and 2 more
- 9Boat ramps
- 3MarinasMunicipal Hall piers, Avela, Rantakestilä Marina
- 4River beachesRajamaanranta, Pietarilanranta and 2 more
From OpenStreetMap, within 1.9 km of the river. Not mapped is not the same as not there.
Cross-checked with our atlases
Iijoki 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.
37lakes on its wayLakeyas
44beaches at the mouth and on the banksCoastya
1mountain at the sourcePeakyas
14islands off the mouthIslandyas
Lakes and reservoirs (37)
Lakes it flows through, by Lakeyas
- Iijärvikm 1820km²
- Soivionjärvikm 29 · 12 m deep7.8km²
- Lake Kerokm 6253km²
- Jokijärvikm 866.3km²
- Pieni Haukijärvikm 146 · 20 m deep0.5km²
- Jongunjärvikm 17525km²
- Pudasjärvikm 1944.3km²
- Naisjärvikm 2094.2km²
29 more on LakeyasLakeyas is coming soonOpen Lakeyas ↗
Beaches (44)
At the mouth (25 km) and on the banks, by Coastya
- Praava3.8 km away15.5°C
- Onganranta23 km away15.5°C
- Hanhihieta19 km away15.5°C
- Martinlahti11 km away · cove15.5°C
- Ukonkaivos15 km away · cove15.5°C
- Kurtinhauta12 km away · cove15.5°C
- Kreuksenlahti8.9 km away · cove15.5°C
- Seipiperä14 km away · cove15.5°C
36 more on CoastyaOpen Coastya ↗
Mountains at the source (1)
Within 15 km of the source, by Peakyas
- Kuparivaara6.7 km away
Islands off the mouth (14)
Within 30 km of the mouth, by Islandyas
- Kraaseli25 km away5.0km²
- Röyttä7.3 km away0.6km²
- Kahvankari29 km away0.0km²
- Kropsu20 km away0.3km²
- Lönkytin15 km away
- Satakari8.2 km away0.8km²
- Iso-Miehikkä13 km away
- Rapakari24 km away
6 more on IslandyasIslandyas 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.
Photos
Iijoki in pictures
Tributaries
Where it flows, and what flows into it
Tributaries (3)
Also: Siuruanjoki, Livojoki, Kostonjoki
Nearby
Rivers nearby
Finland107 km250 m³/s34 km awayKemijokiFinland550 km560 m³/s65 km awayTorne River
Sweden470 km380 m³/s77 km awayKalix RiverSweden461 km290 m³/s122 km awayOunasjokiFinland300 km160 m³/s135 km awayPite RiverSweden400 km160 m³/s187 km awaySkellefte RiverSweden410 km160 m³/s211 km awayMuonio RiverSweden230 km160 m³/s220 km awayWhere these numbers come from
| Name, length, places | Wikidata (Q1472085) · 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 | Lakeyas, Coastya, 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?
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