Which state shares a border with Canada?

Montana is the correct answer because it is one of the U.S. states that shares a northern border with Canada. The state has a long stretch of international border and is known for its mountainous and open landscapes that lie directly adjacent to the Canadian provinces of British Columbia and Alberta.

This geographical feature is significant because it allows for various cross-border relations, including trade and tourism, as well as cultural exchanges between the two countries. The other states listed—Texas, California, and Colorado—do not share a border with Canada. Texas and California border Mexico to the south, while Colorado is bordered by several states but does not have any northern border with Canada. Understanding the geography of state borders is essential for grasping the broader context of U.S.-Canada relations.