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.

French explorers called it Baie du Tonnerre which was translated to Thunder Bay in English.

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.

Its eastern entrance is Thunder Cape, a prominent headland at the southern tip of Sibley Peninsula.