Thunder Bay (Ontario)

Thunder Bay
Thunder Bay as seen from Sleeping Giant
Thunder Bay
LocationThunder Bay District, Ontario, Canada
Coordinates48°22′00″N 89°02′00″W / 48.3667°N 89.0333°W / 48.3667; -89.0333
TypeBay
Part ofLake Superior
Primary inflowsKaministiquia River, Current River
Max. length55 km (34 mi)
Max. width24 km (15 mi)
Surface elevation183 m (600 ft)
IslandsCaribou, Pie, Welcome Islands
SettlementsThunder Bay

Thunder Bay is a large bay on the northern shore of Lake Superior, in Thunder Bay District, Ontario, Canada. The bay is bordered to the east by the Sibley Peninsula at the southern tip of which is Thunder Cape, marking the entrance to the bay for ships approaching from the east. The mesas and sills on the peninsula are known as the Sleeping Giant due to their appearance when viewed from Thunder Bay.

The harbour at the City of Thunder Bay is Canada's westernmost port on the Great Lakes.

The Ojibwa called it Animikie, meaning "thunder". French explorers called it Baie du Tonnerre which was translated to Thunder Bay in English. In 1871, the bay gave its name to the newly created Thunder Bay District, and in 1970, the amalgamated city of Port Arthur and Fort William also adopted the name Thunder Bay.

The waters along the bay's shores form part of the Lake Superior Water Trail. This 1,000 kilometres (620 mi) long water trail is a link in the Trans Canada Trail network and provides paddlers access to the bay and facilities for travel along the coast from Gros Cap to the City of Thunder Bay.