Two rivers through which the International border runs are Rainy River and Pigeon River.
Two other rivers through which the International border runs are St Marys River and St Clair River.
Two more rivers through which the International border runs are Detroit River and Niagara River.
Lake Erie
Mexico and Canada.
the st.lawrence river forms part of the border between the u.s and canada. The rio grande borders between the u.s and mexico.
Canada and Mexico
Mexico/Canada
The two US National Parks that border with Canada are Glacier National Park and Waterton Lakes National Park.
Do you mean countries? If you do, the two countries that border the U.S. are Canada and Mexico.
Canada and Mexico
Canada and Mexico
The following are some of the rivers that are in both Canada and the US: Columbia River, Kootenay River, Milk River, Souris River, Red River, Richelieu River. They all cross the Canada/US border at least once, and a few of them do so twice.
Mexico and Canada
Mexico and Canada