Petawawa River

Geobox River
name = Petawawa River
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image_size = 300px
image_caption = "The dangerous Crooked Chute in Algonquin Park"
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country = Canada flagicon|Canada
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state = Ontario flagicon|Ontario
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source_region = Algonquin Provincial Park
source_state = Ontario flagicon|Ontario
source_country = Canada flagicon|Canada
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mouth_state = Ontario flagicon|Ontario
mouth_country = Canada flagicon|Canada
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The Petawawa River is a river in eastern Ontario, Canada.

It starts at Butt Lake in northern Algonquin Park and flows east, emptying into the Ottawa River at the Town of Petawawa. The river is km to mi|187 in length and drains an area of km2 to mi2|4200|precision=-2, with a mean discharge of 45 m³/s (source: Atlas of Canada).

The river's name comes from the Algonquian language, meaning "where one hears a noise like this", which refers to its many rapids. From the late 1800s until the 1960s, the river was used for log driving of the timber from the forested areas surrounding the river. The river is popular among canoeing and kayaking enthusiasts for its white water rapids and often spectacular views.

Part of the Petawawa River lies in the Ottawa-Bonnechere Graben which is a 175 million year old rift valley.

Tributaries of this river include:
* Barron River
* Crow River
* Little Madawaska River
* Nipissing River
* North River