Where is Quebec city located in relation to Montreal and the St. Lawrence River?

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Quebec City is located approximately 150 miles (240 km) northeast of Montreal along the St. Lawrence River.1

The city is situated at the confluence of the St. Lawrence and Saint-Charles rivers. Its location is strategically significant because the river narrows at this point, marking the farthest upstream location that oceangoing vessels could historically navigate. Additionally, the city was built on a high ridge, providing it with a commanding view of the river that offered major military advantages.1