Mattagami River

The Mattagami River is a river in Northern Ontario, Canada.

Mattagami River Rivière Mattagami (in French)
Mattagami River at Smooth Rock Falls
Location of the mouth of the Mattagami River in Ontario
Etymology	Ojibwe language
Location
Country	Canada
Province	Ontario
Region	Northeastern Ontario
Districts	Cochrane Timiskaming Sudbury
Physical characteristics
Source	Mattagami Lake
• location	Gouin Township, Sudbury District
• coordinates	48°00′46″N 81°33′28″W / 48.01278°N 81.55778°W / 48.01278; -81.55778
• elevation	330 m (1,080 ft)
Mouth	Moose River
• location	Gardiner Township, Cochrane District
• coordinates	50°43′42″N 81°29′14″W / 50.72833°N 81.48722°W / 50.72833; -81.48722
• elevation	48 m (157 ft)
Length	443 km (275 mi)
Basin size	37,000 km2 (14,000 sq mi)
Basin features
River system	James Bay drainage basin

The Mattagami flows 443 kilometres (275 mi) from its source at Mattagami Lake in geographic Gouin Township^[1] in the Unorganized North Part of Sudbury District, on the Canadian Shield southwest of Timmins,^[2] to Portage Island in geographic Gardiner Township^[3] in the Unorganized North Part of Cochrane District, in the Hudson Bay Lowlands.^[4] Here the Mattagami's confluence with the Missinaibi River forms the Moose River, about 100 kilometres (60 mi) from that river's tidewater outlet at James Bay.^[5] The Mattagami River flows through the city of Timmins as well as the town of Smooth Rock Falls^[5] and its drainage basin encompasses 37,000 square kilometres (14,000 sq mi).^[2]

The Mattagami's name comes from the Ojibwe and means either "the start of water" (maadaagami) or "turbulent water" (madaagami), but the local Ojibwe population claim "Mattagami" is a corrupted form of "confluence" (maadawaagami). According to the Mattagami First Nation, Mattagami means "Meeting of the Waters".