Idk about Montpelier but Aspen is kind of connected to a more populated area in the Roaring Fork valley.

It might not count as a city but Nome Alaska has the Iditarod with only, 3700 people. Or maybe some famous battlefield, Gettysburg has 7100 people. A ski resort like Aspen could count with 7000. We all had to memorize state capitals so maybe somewhere like Montpelier, Vermont has more recognition but has 7800 people.