A few facts about the 5000 mile Canadian-US border from
http://www.cric.ca/en_html/guide/border/border.html
The Canada-U.S. border stretches 5,061 km (3,145 miles) on land and 3,832 km (2,381 miles) over water.
The International Boundary Commission, established in 1908, maintains the
transcontinental line.
More than $1.9 billion in goods and more than 300,000 people moving across the Canada-US border each day, both countries have a critical stake in each other’s economic security.
The Canada-United States border, established over two centuries ago, is much more than just a geographic line between Canada and the United States.
At 5,061 km/3,145 miles on land and
3,832 km/2,381 miles over water, Canada and the United States share the world's longest non-militarized border.
In terms of "people traffic," over 200 million two-way border crossings took place in 1999 at 130 border-crossing points. On the Canadian side of the border, there are approximately 350 Citizenship and Immigration Canada agents and 1,310 Canada Customs and Revenue Agency inspectors. On the U.S. side, there are approximately 700 U.S. Customs inspectors, 512 Immigration and Naturalization Service inspectors and 310 Border Patrol agents.
The Royal Canadian Mounted Police (supported by the Canadian Coast Guard) and the U.S. Coast Guard also monitor our maritime border on the Great Lakes and the Atlantic and Pacific coasts.