International Boundary US Canada Monuments

International Boundary US-Canada Monuments are in North Cascades National Park, in the U.S. state of Washington. The monuments were erected along the international border between the U.S. and Canada between the years 1906 and 1907. The original monuments were constructed between 1859 and 1860 but no longer exist. A total of 17 monuments can be found along the northern border of the park.