Montana/South Dakota Trivia Question

[Grisly Fan]

What is unique about Montana's border with South Dakota?

 

[Yukon]

shortest border among all states that border Montana?

 

[Grisly Fan]

shortest border among all states that border Montana?

True but the answer is something a big stranger than that...

 

[AZGrizFan]

The one mile "error"?

 

[dupuyer griz]

It's not properly fenced to keep Dakotans out.

 

[Grisly Fan]

Well so as to not waste a whole lot of people's time guessing, the answer is...

It is the only U.S. interstate border not crossed by a paved road!

 

[GrizMusician]

Well so as to not waste a whole lot of people's time guessing, the answer is...

It is the only U.S. interstate border not crossed by a paved road!

...wait... seriously? We only have dirt roads connecting???