Canada–United States border

"International Boundary" redirects here. For other boundaries between nations, see border.

The Peace Arch at the border between Surrey, British Columbia, and Blaine, Washington

A Royal Canadian Mounted Police constable and a state trooper before the official ceremony commemorating the joining of the Portland–Montreal Pipe Line 1 August 1941

The Canada–United States border, officially known as the International Boundary, is the longest international border in the world. The terrestrial boundary (including small portions of maritime boundaries on the Atlantic, Pacific, and Arctic coasts, as well as the Great Lakes) is 8,891 kilometres (5,525 mi) long, including 2,475 kilometres (1,538 mi) shared with Alaska.

History

For more details on this topic, see Aroostook War, Oregon boundary dispute and Alaska boundary dispute.

The 45th parallel forms an approximate border between the Canadian province of Quebec (to the north), and the US states of New York and Vermont (to the south).

U.S. counties sharing a land or water border with Canada

  Land border

  Water border

Sign welcoming drivers into the United States

Canadian regions sharing a land or water border with the USA

  Land border

  Water border

The Treaty of Paris (1783)

The border originated with the Treaty of Paris in 1783, which ended the American Revolutionary War between Great Britain and the separating colonies which would form the United States. The 45th parallel was established as the border between Lower Canada (Quebec) and New York State (including what is now Vermont). The St. Lawrence River and the Great Lakes became the boundary between Upper Canada (Ontario) and the United States.

The Jay Treaty (1794)

The Jay Treaty of 1794 (effective 1796) created the International Boundary Commission, which was charged with surveying and mapping the boundary. It also provided for removal of British military and administration from Detroit and other frontier outposts on the U.S. side. It was superseded by the Treaty of Ghent (effective 1815) concluding the War of 1812, which included pre-war boundaries.

The 49th parallel north forms a border between the Canadian provinces of British Columbia, Alberta, Saskatchewan, and Manitoba (to the north), and the US states of Washington, Idaho, Montana, North Dakota, and Minnesota (to the south).

The London Convention (1818)

Westward expansion of both British North America and the United States saw the boundary extended west along the 49th parallel from the Northwest Angle at Lake of the Woods to the Rocky Mountains under the Treaty of 1818. This treaty extinguished British claims south of that latitude to the Red River Valley, which was part of Rupert's Land. The treaty also extinguished U.S. claims to land north of that line in the watershed of the Missouri River, which was part of the Louisiana Purchase; this amounted to three small areas, consisting of the northern part of the drainages of the Milk River (today in southern Alberta and southwestern Saskatchewan), the Poplar River (Saskatchewan), and Big Muddy Creek (Saskatchewan).

Ashburton Treaty (1842)

Disputes over the interpretation of the border treaties, and mistakes in surveying it, required additional negotiations resulting in the Webster–Ashburton Treaty of 1842. The treaty resolved the dispute known as the Aroostook War over the boundary between Maine on the one hand, and New Brunswick and the Province of Canada on the other. The treaty redefined the border between New Hampshire, Vermont and New York on the one hand, and the Province of Canada on the other, resolving the Indian Stream dispute and the Fort Blunder dilemma at the outlet to Lake Champlain. The boundary along the 45th parallel had been surveyed after the War of 1812. The US Government began to construct fortifications just south of the border at Rouses Point on Lake Champlain. After a significant portion of the construction was completed, measurements revealed that at that point, the actual 45th parallel was three-quarters of a mile south of the surveyed line; the fort, which became known as "Fort Blunder", was in Canada. This created a dilemma for the United States that was not resolved until a provision of the treaty left the border on the meandering line as surveyed. The border along the Boundary Waters in present-day Ontario and Minnesota between Lake Superior and the Northwest Angle was also redefined.

The Oregon Treaty (1846)

An 1844 boundary dispute during U.S. President James K. Polk's administration led to a call for the northern boundary of the U.S. west of the Rockies to be latitude 54° 40' north (related to the southern boundary of Russia's Alaska Territory), but the United Kingdom wanted a border that followed the Columbia River to the Pacific Ocean. The dispute was resolved in the Oregon Treaty of 1846, which established the 49th parallel as the boundary through the Rockies.

The Northwest Boundary Survey (1857-61)

Boundary Marker No.1 on the 49th parallel north on the western shore of Point Roberts, Washington, erected in 1861

The Northwest Boundary Survey (1857–61) laid out the land boundary, but the water boundary was not settled for some time. After the Pig War in 1859, arbitration in 1872 established the border between the Gulf Islands and the San Juan Islands.

The International Boundary Survey (1872-1876)

The International Boundary Survey, called the Northern Boundary Survey in the United States, began in 1872. Its mandate was to establish the border as agreed to in the Treaty of 1818. Archibald Campbell led the way for the United States. Donald Cameron headed the British team. This survey focused on the border from the Lake of the Woods to the summit of the Rocky Mountains.

The Alaska boundary dispute (1903)

In 1903 a joint United Kingdom – Canada – U.S. tribunal established the boundary with Alaska, much of which follows the 141st meridian west.

International Boundary Commission (1925)

For the bilateral commission concerning boundary waters use, see International Joint Commission.

The Oregon Country / Columbia District

Modern International Boundary Commission boundary marker at Point Roberts, Washington. The reverse side has the same wording in French.

In 1925, the International Boundary Commission was made a permanent organization responsible for surveying and mapping the boundary, maintaining boundary monuments (and buoys where applicable), as well as keeping the boundary clear of brush and vegetation for 6 metres (20 ft). This "border vista" extends for 3 metres (9.8 ft) on each side of the line. Along the 49th parallel, the border vista is theoretically straight but in practice follows the 19th century surveyed border markers and varies by several hundred feet in spots.

The Commission's annual budget is about US$1.4 million

The Commission is headed by two commissioners, one of whom is Canadian, the other American. In July 2007, the Bush administration relieved U.S. Commissioner Dennis Schornack of his post in connection with a dispute between the boundary commission and the U.S. government over private construction near the border. Schornack rejected the dismissal, saying that the commission is an independent, international organization outside the U.S. government's jurisdiction, and that according to the 1908 treaty that created it, a vacancy can only be created by "the death, resignation or other disability" of a commissioner. The Canadian government said that it was taking no position on the matter, but Peter Sullivan, the Canadian commissioner, said on July 13 that he was ready to work with David Bernhardt, a Colorado-based solicitor of the Department of the Interior, who was designated as the acting U.S. commissioner by President Bush.

Security

Law enforcement approach

A sign at the International Boundary in Point Roberts, Washington, warning against illegal crossing of the border

The border crossing where British Columbia Highway 37A ends at Hyder, Alaska, is unmanned by United States Customs, though Canadian Customs does maintain a presence in the area.

The International Boundary is commonly referred to as the world's longest undefended border, but this is true only in the military sense, as civilian law enforcement is present. It is illegal to pass the border outside border controls. Everyone passing the border must be checked. The relatively low level of security measures stands in contrast to that of the United States – Mexico border (one-third as long as the Canada–U.S. border), which is actively patrolled by U.S. customs and immigration personnel to prevent illegal migration and drug trafficking.

Parts of the International Boundary cross through mountainous terrain or heavily forested areas, but significant portions also cross remote prairie farmland and the Great Lakes and Saint Lawrence River, in addition to the maritime components of the boundary at the Atlantic, Pacific, and Arctic oceans. The border also runs through the middle of the Akwesasne Nation and even divides some buildings found in communities in Vermont and Quebec whose construction pre-dated the border's delineation. On the Maine-New Brunswick border, it divides the Aroostook Valley Country Club.

The actual number of U.S. and Canadian border security personnel is classified; there are in excess of 17,000 United States Border Patrol personnel on the Mexico–U.S. border alone.

Following the September 11, 2001, terrorist attacks in the United States, border security along the International Boundary was dramatically tightened by both nations in both populated and rural areas. Both nations are also actively involved in detailed and extensive tactical and strategic intelligence sharing.

As of December 2010, Canada and the United States are negotiating an agreement titled "Beyond the Border: A Shared Vision for Perimeter Security and Competitiveness" which would give the U.S. more influence over Canada's border security and immigration controls, and more information would be shared by Canada with the U.S.

Security measures

Border crossing between Yukon and Alaska

Residents of both nations who own property adjacent to the border are required to report construction of any physical border crossing on their land to their respective governments, and this is enforced by the International Boundary Commission. Where required, fences or vehicle blockades are used. All persons crossing the border are required to report to the respective customs and immigration agencies in each country. In remote areas where staffed border crossings are not available, there are hidden sensors on roads and also scattered in wooded areas near crossing points and on many trails and railways, but there are not enough border personnel on either side to verify and stop coordinated incursions. There is no border zone; the U.S. Customs and Border Protection routinely sets up checkpoints as far as 100 miles (160 km) into U.S. territory.

Smuggling

Smuggling of alcoholic beverages ("rum running") was widespread during the 1920s, when Prohibition was in effect nationally in the United States and parts of Canada.

In more recent years, Canadian officials have complained of drug, cigarette and firearms smuggling from the United States, while U.S. officials have complained of drug smuggling from Canada.

In July 2005, law enforcement personnel arrested three men who had built a 360-foot (110 m) tunnel under the border between British Columbia and Washington that they intended to use for smuggling marijuana, the first such tunnel known on this border.

Cornwall, Ontario, experiences ongoing smuggling - mostly of tobacco and firearms from the United States - due to its location. The neighbouring Mohawk territory of Akwesasne straddles the Ontario-Quebec-New York borders, and its First Nations sovereignty prevents Ontario Provincial Police, Royal Canadian Mounted Police, Canada Border Services Agency, Canadian Coast Guard, United States Border Patrol, United States Coast Guard and New York State Police from exercising jurisdiction over exchanges taking place within the territory.

Western Hemisphere Travel Initiative (WHTI)

Main article: Western Hemisphere Travel Initiative

In late 2006, the United States Department of Homeland Security (DHS) announced a rule regarding new identification requirements for U.S. citizens and international travelers entering the U.S. Implemented on January 23, 2007, this final rule and first phase of the WHTI specifies six forms of identification—one of which is required in order to enter the U.S. by air: a valid passport, a passport card, a state enhanced driver's license (available in Michigan, New York, Vermont, Washington, British Columbia, Manitoba, Ontario and Quebec) per the Western Hemisphere Travel Initiative, or trusted traveler program card (NEXUS, FAST, or SENTRI); a valid Merchant Mariner Credential when traveling in conjunction with official maritime business; or a valid U.S. military identification card when traveling on official orders.

Since June 2009, every traveller arriving via a land or sea port-of-entry (including ferries) has been required to present one of the above forms of identification to cross the border.

Border lengths

Rank	State	Length of border with Canada		Rank	Province/Territory	Length of border with the U.S.
1	Alaska	2,475 km (1,538 mi)		1	Ontario	2,760 km (1,715 mi)
2	Michigan	1,160 km (721 mi)		2	British Columbia	2,168 km (1,347 mi)
3	Maine	983 km (611 mi)		3	Yukon	1,210 km (752 mi)
4	Minnesota	880 km (547 mi)		4	Quebec	813 km (505 mi)
5	Montana	877 km (545 mi)		5	Saskatchewan	632 km (393 mi)
6	New York	716 km (445 mi)		6	New Brunswick	513 km (318 mi)
7	Washington	687 km (427 mi)		7	Manitoba	497 km (309 mi)
8	North Dakota	499 km (310 mi)		8	Alberta	298 km (185 mi)
9	Ohio	235 km (146 mi)
10	Vermont	145 km (90 mi)
11	New Hampshire	93 km (58 mi)
12	Idaho	72 km (45 mi)
13	Pennsylvania	68 km (42 mi)

Crossings and border straddling

Notable bridge/tunnel crossings

The Ambassador Bridge between Detroit, Michigan, and Windsor, Ontario, is the busiest commercial crossing between the two countries.

Niagara Falls: The American Falls is on the left in New York; the Horseshoe Falls on the right separates New York from Ontario.

Main article: List of Canada–United States border crossings

• Douglas Crossing/Peace Arch - Surrey, British Columbia, and Blaine, Washington
• Fort Frances–International Falls International Bridge – Fort Frances, Ontario, and International Falls, Minnesota
• Baudette – Rainy River International Bridge – Baudette, Minnesota, and Rainy River, Ontario
• Sault Ste. Marie International Bridge – Sault Ste. Marie, Michigan, and Sault Ste. Marie, Ontario
• Blue Water Bridge – Port Huron, Michigan, and Sarnia, Ontario
• St. Clair Tunnel
• Detroit–Windsor Tunnel – Windsor, Ontario, and Detroit, Michigan
• Michigan Central Railway Tunnel – Windsor, Ontario, and Detroit, Michigan
• Ambassador Bridge – Windsor, Ontario, and Detroit, Michigan
• Peace Bridge – Fort Erie, Ontario, and Buffalo, New York
• Rainbow Bridge – Niagara Falls, Ontario, and Niagara Falls, New York
• Whirlpool Rapids Bridge – Niagara Falls, Ontario, and Niagara Falls, New York
• Lewiston–Queenston Bridge – Queenston, Ontario, and Lewiston, New York
• Thousand Islands Bridge – Wellesley Island, New York, and Hill Island, Ontario
• Ogdensburg–Prescott International Bridge – Ogdensburg, New York, and Johnstown, Ontario
• Three Nations Crossing – Cornwall, Ontario, and Massena, New York
• Blackpool Border Crossing – Saint-Bernard-de-Lacolle, Quebec, and Champlain, New York

Other border crossings (airports, seaports, rail stations)

Border sign at the Rainbow Bridge, Niagara Falls

The U.S. maintains immigration offices, called "pre-clearance facilities", in eight Canadian airports with international air service to the United States (Calgary, Edmonton, Halifax, Montreal, Ottawa, Toronto, Vancouver, and Winnipeg). This expedites travel by allowing flights originating in Canada to land at a U.S. airport without being processed as an international arrival. Similar arrangements exist at major Canadian seaports that handle sealed direct import shipments into the U.S.

Canada does not maintain equivalent personnel at U.S. airports due to the sheer number of US departure locations with Canadian-bound flights and the limited number of flights compared to the number of U.S.-bound flights that depart major Canadian airports. Additionally, at Vancouver's Pacific Central Station, passengers are required to pass through U.S. pre-clearance facilities and pass their baggage through an X-ray before being allowed to board the Seattle-bound Amtrak Cascades train, which makes no further stops before crossing the border. Pre-clearance facilities are not available for the popular New York City to Montreal (Adirondack) or Toronto (Maple Leaf) lines, as these lines have stops between Montreal or Toronto and the border. Instead, passengers must clear customs at a stop located at the actual border.

Ferry services operate between the province of New Brunswick and the state of Maine, as well as between the province of British Columbia and the states of Washington and Alaska. There are also several ferry services in the Great Lakes operating between the province of Ontario and the states of Michigan, New York, and Ohio. The ferry between Maine and Nova Scotia ended its route in 2009, but resumed operations in 2014.

Boldt Castle on Heart Island in the St. Lawrence River has a border control point on the island, but no specific location on the Canadian side. Canadians must present identification to land on the island.

Cross-border airports

One curiosity on the Canada–U.S. border is the presence of six airports that straddle the borderline. The airports were built prior to the US entry into World War II as a way to legally transfer US-built aircraft such as the Lockheed Hudson to Canada under the provisions of the Lend-Lease Act. In the interest of maintaining neutrality, US military pilots were forbidden to deliver combat aircraft to Canada. The aircraft were flown to the border, landed, and then at night towed on their wheels over the border by tractors or horses. The next day the planes were crewed by RCAF pilots and ferried to the Atlantic.

Piney Pinecreek Border Airport is located in Manitoba and Minnesota. The northwest/southeast-oriented runway straddles the border, and there are two ramps; one in Canada and one in the US. The airport is jointly owned by the Minnesota Department of Transportation and the local government of Piney, Manitoba. It is assigned US identifier 48Y and Canadian identifier JX2.

International Peace Garden Airport is located in Manitoba and North Dakota adjacent to the International Peace Garden. The runway is entirely within North Dakota, but a ramp extends across the border to allow aircraft to access Canadian customs. While not jointly owned, it is operated as an international facility for customs clearance as part of the International Peace Garden.

Coronach/Scobey Border Station Airport is located in Saskatchewan and Montana. The east–west runway is sited exactly on the border. The airport is jointly owned by the Canadian and US governments and is assigned US identifier 8U3 and Canadian identifier CKK3.

Coutts/Ross International Airport is located in Alberta and Montana. Like Coronach/Scobey, the east–west runway is sited exactly on the border. It is owned entirely by the Montana Aeronautics Division. It is assigned US identifier 7S8 and Canadian identifier CEP4.

Whetstone International Airport or Del Bonita/Whetstone International Airport is located in Alberta and Montana, and similarly has an east–west runway sited exactly on the border. It is assigned US identifier H28 and Canadian identifier CEQ4.

Avey Field State Airport is located in Washington and British Columbia. The privately owned airfield is mostly in the US, but several hundred feet of the north-south runway extend into Canada, and both Canadian and US customs are available. It is assigned US identifier 69S but does not have a Canadian identifier.

Cross-border buildings

Half of this bench is in the United States and the other half is in Canada.

The Haskell Free Library and Opera House straddles the border in Derby Line, Vermont, and Stanstead, Quebec. Private homes are divided by the International Boundary line between Estcourt Station, Maine, and Pohénégamook, Quebec. Private homes between Beebe Plain, Quebec and Beebe Plain, Vermont, a seasonal home between Alburgh, Vermont, and Noyan, Quebec (at the intersection of Matthias Lane in Alburgh and Chemin au Bord du L'eau in Noyan) as well as between Richford, Vermont, and Abercorn, Quebec (1 house) also are divided by the border.

The Halfway House, a tavern also known as Taillon's International Hotel, straddles the border between Dundee, Quebec, and Fort Covington, New York. It was built in 1820, before the border was surveyed.

Boundary divisions

Practical exclaves

To be a true international exclave, all potential paths of travel from the exclave to the home country must cross over only the territory of a different country or countries. Like exclaves, practical exclaves are not contiguous with the land of the home country and have land access only through another country or countries. Unlike exclaves, they are not entirely surrounded by foreign territory. Hence, they are exclaves for practical purposes, without meeting the strict definition.

Practical exclaves of Canada

• Akwesasne: Because of the St. Lawrence River to the north and New York State, USA to the south, the Quebec portion of the Akwesasne reserve is a practical exclave of Canada. To travel by land from Tsi:Snaine (Snye or Chenail, Quebec) or Kana:takon (Saint Regis, Quebec) to elsewhere in Canada, one must drive through New York State.
• Campobello Island, located at the entrance to Passamaquoddy Bay, adjacent to the entrance to Cobscook Bay, and within the Bay of Fundy. The island is part of Charlotte County, New Brunswick, but is actually physically connected by the Franklin Delano Roosevelt Bridge with Lubec, Maine - the easternmost tip of the continental United States.

Practical exclaves of the United States

• The state of Alaska is bounded by the Canadian province of British Columbia and territory of Yukon, the Arctic Ocean, the Bering Sea, and the Pacific Ocean.
• Point Roberts, Washington, is bounded by the Canadian province of British Columbia, the Strait of Georgia, and Boundary Bay.
• Elm Point, Minnesota, and a small piece of uninhabited land just to its west are bounded by Manitoba and Lake of the Woods.
• The Northwest Angle, the northernmost part of the contiguous 48 states, is bounded by Manitoba and Lake of the Woods.
• The Alburgh Tongue in Lake Champlain, location of the town of Alburgh, Vermont (Quebec).
• Province Point, the small end of a peninsula east of Alburgh, Vermont, is bounded by Quebec and Lake Champlain.
• Unnamed point, unnamed lake Rolette County, North Dakota, at 48°59′54″N 99°52′45″W.
• Unnamed point, Broughton Slough Cavalier County, North Dakota, at 49°0′0.26″N 98°48′10.2″W.

Islands divided by the border

• Canada and the U.S. divide an island in the Columbia River at 49°0.04′N 117°38.01′W near the Waneta border crossing of Washington and British Columbia.
• Salt Lake in northeastern Montana, which is known as Alkali Lake in Saskatchewan, contains an island (when it is not dry) that is crossed by the international border at its southern tip (49°0′0″N 104°18′39.4″W).
• The two nations also divide two islands on their international border in Boundary Lake, North Dakota and Manitoba. The larger eastern island lies at 48°59′57″N 100°12′47″W; the tiny western island is at 48°59′57″N 100°13′1.5″W.
• Each nation shares the 77-acre (31 ha) Province Island in Lake Memphremagog, Vermont and Quebec. The small southern tip is on the U.S. side; the remaining 90% of the island is Canadian.

Other divided islands with a shared land border are (listed by state with neighboring province in parentheses):

Alaska (Yukon)

• A lake island at 62.649677°N 141°W / 62.649677; -141, north of the Alaska Highway border crossing
• A lake island at 62.641158°N 141°W / 62.641158; -141, north of the Alaska Highway border crossing (Yukon)
• A lake island at 62.637174°N 141°W / 62.637174; -141, north of the Alaska Highway border crossing (Yukon)
• Two islands in small lake at 62.538443°N 141°W / 62.538443; -141, south of the Alaska Highway border crossing (Yukon)
• 9 islands serially located in river on the Alaska North Slope that drains into the Beaufort Sea near Demarcation Bay; northernmost at 69.616789°N 141°W / 69.616789; -141, southernmost at 69.557094°N 141°W / 69.557094; -141
• One or more islands in Boulevard Creek at 68.881754°N 141°W / 68.881754; -141, northeast of Arctic Village, Alaska
• An island in Mancha Creek at 68.663957°N 141°W / 68.663957; -141, northeast of Arctic Village
• 6 (or more) islands in bifurcated river flow at 68.641781°N 141°W / 68.641781; -141, northeast of Arctic Village
• An island at mouth of tributary of Porcupine River at 67.426117°N 141°W / 67.426117; -141, downstream of Old Crow, Yukon
• An island at 66.838155°N 141°W / 66.838155; -141, east of Chalkyitsik, Alaska
• An island at 66.759004°N 141°W / 66.759004; -141, east of Chalkyitsik
• An island at 66.543661°N 141°W / 66.543661; -141, east of Chalkyitsik
• An island at 62.227460°N 141°W / 62.227460; -141, southwest of Beaver Creek, Yukon
• Two islands in Klehini River at 59.448142°N 136.365213°W / 59.448142; -136.365213, near Klukwan, Alaska
• 11 (or more) islands in bifurcated river flow on Whiting River at 58.184862°N 133.221034°W / 58.184862; -133.221034, upstream of Gilbert Bay, which empties into Stephens Passage
• Two islands in Stikine River at 56.658546°N 131.848698°W / 56.658546; -131.848698, downstream of Great Glacier, Yukon

Washington

• Several rocky islets in a small lake at 49°N 120.177376°W / 49; -120.177376 (British Columbia)
• An island in small lake at 49°N 120.172980°W / 49; -120.172980 (British Columbia)

Montana

• An island in small lake adjacent to Milk River at 49°N 110.546975°W / 49; -110.546975 (Alberta)
• An island in Belly River at 49°N 113.683294°W / 49; -113.683294 (Alberta)
• An island in river at 49°N 113.600862°W / 49; -113.600862 (Alberta)
• An islet in river at 49°N 113.357300°W / 49; -113.357300 (Alberta)
• An island in St. Mary River 49°N 113.326222°W / 49; -113.326222 (Alberta)
• An islet in Milk River at 49°N 112.555602°W / 49; -112.555602 (Alberta)
• An island in river at 49°N 109.089222°W / 49; -109.089222 (Saskatchewan)
• An island in river at 49°N 106.938504°W / 49; -106.938504 (Saskatchewan)

North Dakota

• An island in Brush Lake at 49°N 103.981638°W / 49; -103.981638 (Saskatchewan)
• An islet in the South Antler River in Bottineau County at 49°N 101.205728°W / 49; -101.205728 (Manitoba)
• An island in the Pembina River at 49°N 98.205990°W / 49; -98.205990 (Manitoba)
• An island in Lake Metigoshe at 49°N 100.353901°W / 49; -100.353901 (Manitoba)
• An islet east of Ross Lake at 49°N 100.298939°W / 49; -100.298939 (Manitoba)
• An island in small lake at 49°N 100.013149°W / 49; -100.013149 (Manitoba)
• An island in small lake at 49°N 99.218163°W / 49; -99.218163 (Manitoba)
• An island in small lake at 49°N 98.541357°W / 49; -98.541357 (Manitoba)
• An islet in a reservoir (when filled) just east of the Maida port of entry on North Dakota Highway 1 at 49°N 98.356943°W / 49; -98.356943 (Manitoba)

Maine

• An island in tributary of Northwest Branch Saint John River at 46.687062°N 69.998996°W / 46.687062; -69.998996 (Quebec)
• An islet in small lake at 46.004988°N 67.7810°W / 46.004988; -67.7810 (New Brunswick)
• An island in North Branch Meduxnekeag River at 46.276686°N 67.782°W / 46.276686; -67.782 (New Brunswick)
• An island in river at 46.272890°N 67.782°W / 46.272890; -67.782 (New Brunswick)
• An island in river at 46.272293°N 67.782°W / 46.272293; -67.782 (New Brunswick)

Remaining boundary disputes

Main article: List of areas disputed by Canada and the United States

• Machias Seal Island and North Rock (Maine / New Brunswick)
• Dixon Entrance (Alaska / British Columbia)
• Beaufort Sea (Alaska / Yukon)
• Strait of Juan de Fuca (Washington / British Columbia)

See also

• American entry into Canada by land
• Borders of Canada
• Canada Border Services Agency
• Canada–United States relations
• Frozen River, a 2008 feature film about smuggling across the US/Canada border
• Joseph Smith Harris' account of the Northwest Boundary Survey
• List of Canada–United States border crossings
• Mexico–United States border
• United States Border Patrol

References

Further reading

• Anderson, Christopher G. Canadian Liberalism and the Politics of Border Control, 1867-1967 (University of British Columbia Press; 2012) 280 pages; studies pivotal episodes in Canadian immigration policy that shed light on more restrictive approaches today.
• Paulus, Jeremy and Asgary, Ali. (2010) Enhancing Border Security: Local Values and Preferences at the Blue Water Bridge (Point Edward, Canada) Journal of Homeland Security and Emergency Management: Vol. 7 : Iss. 1, Article 77.
• Culture and the Canada-US Border, an international research network dedicated to studying cultural representation, production and exchange on and around the Canada-US border.[1]

External links

Wikimedia Commons has media related to: International borders of Canada or International borders of the United States

• International Boundary Commission
• Indepth: It's a fine line – Disputing boundaries CBC News Online, 11 October 2005
• 1994 trip from Lake of the Woods to the Continental Divide