|Origin||Confluence of Peace and Athabasca|
|Mouth||Great Slave Lake|
|Length||434 km (270 mi)|
|Avg. discharge||3,414 m3/s (120,600 cu ft/s)|
|Basin area||616,400 km2 (238,000 sq mi)|
The Slave River is a river of Canada. It begins near Lake Athabasca, where the Peace River and Athabasca River join. Then it flows north into Great Slave Lake. The river's water drains into the Arctic Ocean via the Mackenzie River.