The Mackenzie River is a river in the Canadian boreal forest. It forms, along with the Slave, Peace, and Finlay, the longest river system in Canada, and includes the second largest drainage basin of any North American river after the Mississippi.
Etymology: Alexander Mackenzie, explorer
Country: Canada
Territories: Northwest Territories · Yukon
Cities: Fort Providence · Fort Simpson · Wrigley · Tulita · Norman Wells · Fort Good Hope · Tsiigehtchic · Inuvik
Source: Great Slave Lake
2nd source: Most distant source of the Mackenzie–Slave–Peace–Finlay–Thutade system