Transition areas between one metro area and the other

[I spent the winter writing songs about getting better]

It's not exactly clear where the St. Cloud area ends and the Twin Cities exurbs begin. I would say that Monticello/Big Lake is when you're in clear Twin Cities exurbia territory though.

[I spent the winter writing songs about getting better]

Putnam County, WV is another example, it's officially part of the Huntington metro but in practice is much closer to being suburbs of Charleston.

[I spent the winter writing songs about getting better]

Although Cleveland to Akron is a valid example.