43rd parallel north
The 43rd parallel north is a circle of latitude that is 43 degrees north of the Earth's equatorial plane. It crosses Europe, the Mediterranean Sea, Asia, the Pacific Ocean, North America, and the Atlantic Ocean.
Around the world 
Starting at the Prime Meridian and heading eastwards, the parallel 43° north passes through:
United States 
The parallel formed the northern border of the historic and extralegal Territory of Jefferson.
See also