|Kollaa River (Kollasjoki)|
|Region||Republic of Karelia|
|- elevation||117 m (384 ft)|
|Length||76 km (47 mi)|
The Kollaa River (Russian: Колласйоки, Finnish: Kollaanjoki or Kollasjoki) is a 76-kilometre long river in the Republic of Karelia, Russia. It starts from Lake Kollasjärvi in the Suoyarvsky District and flows to Lake Tulmozero (Finnish: Tulemajärvi) in the Pryazhinsky District.
During the Winter War in 1939, the area was a scene of the Battle of Kollaa. The river became part of Finnish history, as the Red Army failed to break through there. A memorable quote, "Kollaa holds" (Kollaa kestää), became a legendary motto for the Finns. The river and area are associated with the exploits of the Finnish marksman Simo Häyhä, the gunman with the highest number of confirmed kills in any major war. The battle areas around the river are a preserved monument and tourist site.
- "Battles: Ladoga Karelia Area" (Film microsite). Fire and Ice: The Winter War of Finland and Russia. Indiana, United States: Metropolitan Indianapolis Public Broadcasting (WYFI). Retrieved 2010-01-19.
on December 7th  elements of the Soviet 56th Division reached the area of the Kollaa River. ... the Kollaa River area was the location the Finns were forced to make their stand.
- Snodgrass, Brent (2002-04-07). "Finnish sniper Simo Häyhä during the Winter War". Mosin Man's Military Surplus Firearms. Retrieved 2010-01-19.
Simo Häyhä was called into action during the Winter War with his service under the 6th Company of JR 34 on the Kollaa River.
- "On Both Sides of Kollaa. From the Past to the Present.". Republic of Karelia: The State Centre for the Protection and Management of the Historic and Cultural Monuments of the Ministry of Culture. 2004. Retrieved 2010-01-19.
- "1929 Kollaa (1939 BS)". JPL Small-Body Database Browser. California, United States: NASA Jet Propulsion Laboratory. Retrieved 2010-01-19.
Named for a river in Karelia, scene of violent battles during the Finnish winter war.
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