Ouimet Canyon is a large gorge in the municipality of Dorion, Thunder Bay District in northwestern Ontario, Canada, about 60 kilometres (37 mi) northeast of the city of Thunder Bay. The gorge is 100 metres (330 ft) deep, 150 metres (490 ft) wide and 2,000 metres (2.0 km; 1.2 mi) long, protected as part of Ouimet Canyon Provincial Park.