Ontojärvi–Nurmesjärvi is a rather large lake in the Oulujoki main catchment area in Kainuu, Finland. It is situated in the municipality of Kuhmo.[1] It is the 44th largest lake in the country.[2]

Ontojärvi – Nurmesjärvi
Ontojärvi – Nurmesjärvi
Location	Kainuu
Coordinates	64°08′N 29°13′E
Primary inflows	lakes Lentua, Lammasjärvi, Vieksijärvi
Primary outflows	river Ontojoki to the lake Iso-Kiimanen
Catchment area	Oulujoki
Basin countries	Finland
Surface area	104.572 km2 (40.375 sq mi)
Average depth	5.76 m (18.9 ft)
Max. depth	29 m (95 ft)
Water volume	0.602 km3 (488,000 acre⋅ft)
Shore length1	315.87 km (196.27 mi)
Surface elevation	159.2 m (522 ft)
References	[1]
1 Shore length is not a well-defined measure.

References

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[de] Ontojärvi

[fr] Ontojärvi–Nurmesjärvi