3145 miles by land and 2380 miles by water.
The US-Canada border is the longest border in the world. It stretches for 8,891 km.
The US and Canada border.
2,000 miles
The shortest distance from border to border is 340 miles.
The countries with the longest land border are Canada and the United States. They share a border that is approximately 8,891 kilometers (5,525 miles) long.
Pennsylvania does not border Canada, while both North Dakota and Idaho share a border with Canada. North Dakota is located directly north of South Dakota and has a long border with Canada, while Idaho is to the west of Montana and also has a border with Canada. In contrast, Pennsylvania is located in the northeastern U.S. and is bordered by several states but not by Canada.
1538 miles long
As long as you declare it when crossing the border.
It depends where in Canada you are going, but from LA to the US/Canada border, it will take about 23 hours.
where
93 km or 58 miles
The New Hampshire-Canada border is approximately 58 miles (93 kilometers) long. It runs along the northern edge of New Hampshire, separating it from the Canadian province of Quebec. This border is characterized by a mix of mountainous terrain and forests.