The Lesser Slave River is a river located in north-central Alberta, Canada. It flows from the Lesser Slave Lake and eventually joins the Slave River, which is part of the larger Mackenzie River system. The river is approximately 100 kilometers long and serves as an important waterway for local ecosystems and communities. The surrounding area is rich in wildlife and offers recreational opportunities such as fishing, boating, and birdwatching. The river is also significant for the local Indigenous communities, who have historically relied on its resources for sustenance and cultural practices.