National borders of WHAT country.
Canada has only two land borders with the US. One with the contiguous states and the other with Alaska. These are therefore the two shortest and longest borders.
Canada and the U.S
New South Wales has the longest
California
California
Yellowstone National Park borders Wyoming, Idaho, and Montana.
Lake Superior borders the Pukaskwa National Park of Canada.
The state on the west coast of the United States with the longest coastline is California. California borders on the Pacific Ocean.
No state has both. Alaska has the longest State Border with Canada. Florida has the longest Atlantic shoreline.
Bratislava, Slovakia Borders Austria & Hungary
The two countries with the second longest border in the world are the United States and Canada. Their border stretches approximately 8,891 kilometers (5,525 miles), making it the longest international land border between two countries. This extensive boundary includes both land and water borders, reflecting the vast and diverse geography of North America.
National H'ways stay within the borders of their countries. International H'ways cross borders into and through other countries.