US–Canada border, 1818
49°00′N
Agreed on paper in 1818 and pushed to the Pacific in 1846: about 2,030 km (1,260 miles) of border is this one parallel.
The 1818 Convention ran the 49th parallel from Lake of the Woods to the Rockies; the 1846 Oregon Treaty carried it on to the Strait of Georgia.
- marked by a 6 m cleared swath and over 8,000 boundary monuments
- commonly described as the longest straight international land boundary
Read about US–Canada border, 1818
International lines & treaties
- Fifty-four forty, 1824 · 54°40′N
- Korea's division, 1945 · 38°00′N
- Vietnam's Geneva line, 1954 · 17°00′N
- Antarctic Treaty limit, 1959 · 60°00′S
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