There aren't many cities within 125 miles of the Minot AFB, and all fewer than 200,000 pop. Montana is roughly 700 miles wide across the high line, so it must be farther than you think.
Well, I’m not trying to make a point about Montana specifically, more about ballistic missiles generally.
In fact I think they have essentially zero accuracy until well after they get past the boost phase and get into the cruise - straight line phase.