The Canadian- US border crossing at North Portal, Sask. and Portal, North Dakota is open 24 hours a day. This border crossing is a major port of entry for rail and commercial truck traffic as well as passenger vehicles along the 49th parallel. The port of entry at North Portal - Portal is the 2nd largest port for 1, 000 miles from Grand Portage, MN to Sweetgrass, MT on the U.S. side of the border ...