The Bering Land Bridge National Preserve is one of the most remote national park areas, located on the Seward Peninsula in northwest Alaska. The Preserve is a remnant of the land bridge that connected Asia with North America more than 13,000 years ago. The majority of this land bridge, once thousands of miles wide, now lies beneath the waters of the Chukchi and Bering Seas. During the glacial epoch this was part of a migration route for people, animals, and plants whenever ocean levels fell enough to expose the land bridge. Archeologists agree that it was across this Bering Land Bridge, also called Beringia, that humans first passed from Asia to populate the Americas. The Preserve's western boundary lies 42 miles from the Bering Strait and the fishing boundary between the United States and Russia.