Which geographic feature is located in the area disputed by France and Great Britain during the French and Indian War?

The Cascade Mountains are located in the Pacific Northwest region of the United States, primarily in Washington and Oregon. This mountain range was not a focal point of contention during the French and Indian War, as the conflict predominantly took place in the eastern part of North America, far from the Cascades.

The Columbia River flows through the Pacific Northwest, forming part of the border between the states of Washington and Oregon. While significant for regional trade and exploration, it was not a key geographic feature involved in the territorial disputes between France and Great Britain during the French and Indian War, which centered around the eastern territories.

The Rio Grande serves as a natural border between the United States and Mexico, primarily flowing through the southwestern United States. During the French and Indian War, the focus was on the eastern territories of North America, making the Rio Grande irrelevant to the conflict and its territorial disputes.