49th parallel north, Circle of latitude in Northern Hemisphere.
The 49th parallel north is an imaginary line that circles the Earth at this latitude, passing through North America, Europe, and Asia. This parallel crosses twelve countries and serves as an important reference for cartography and navigation.
The Oregon Treaty established this latitude as the boundary between British and American territories from the Pacific to Lake Superior in 1846. This agreement ended years of tension over control of the Pacific Northwest.
Multiple Indigenous communities near the parallel in North America referred to it as the Medicine Line, marking a territorial division between different governance systems.
Border crossings between Canada and the United States along this line run from Washington to Minnesota. Travelers should expect inspections and possible waiting times at these checkpoints.
At this latitude, the sun stays visible for about 16 hours during summer solstice. During winter solstice, daylight shortens to just eight hours.
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