The 77th parallel north is a circle of latitude that is 77 degrees north of the Earth's equatorial plane, in the Arctic. It crosses the Atlantic Ocean, Europe, Asia, the Arctic Ocean and North America. It is the northernmost integral parallel that passes through continental mainland (namely the Taymyr Peninsula of Siberia).
77th parallel north Wikipedia
Starting at the Prime Meridian and heading eastwards, the parallel 77° north passes through: