49th Parallel <2025>

A notable exception occurs at Vancouver Island, where the border swings south to ensure the entire island remains British. Geographic and Cultural Impact

The is a circle of latitude located 49 degrees north of the Earth's equator. While it spans across Europe and Asia, crossing major landmarks like Charles de Gaulle Airport in Paris, it is most famous as the primary international boundary between the United States and Canada. Stretching over 1,200 miles across the western half of the continent, it forms the longest straight-line section of what is often called the longest undefended border in the world. Historical Establishment 49th Parallel

After years of "joint occupancy" and the American political slogan "Fifty-Four Forty or Fight!" (referring to a more northern line), the two nations compromised by extending the 49th-parallel boundary all the way to the Pacific Ocean. A notable exception occurs at Vancouver Island, where

The border is a "mathematical" line that often defies local geography, cutting through watersheds, mountains, and forests. Stretching over 1,200 miles across the western half