Not exactly the same situation, but this reminds me of the area between the Utah-Arizona border and the north rim of the Grand Canyon. Legally it's part of Arizona but it's much more accessible from Utah (there's no bridge across the Canyon, so to get to the North Rim from the rest of Arizona, you have to drive hundreds of miles out of the way).

It ends up being a sort of no man's land. It's difficult to access for Arizona authorities, and Utah authorities don't have jurisdiction there.

https://en.wikipedia.org/wiki/Arizona_Strip