FWIW, I've been hearing 105.3 (The Fox) from Minot on a fairly regular basis here in Rapid City. Also picked up a Bismarck FM (didn't note the freq) but remember hearing an ad for a business that recently moved across the river to Mandan. 
I'm used to AM traveling a long ways with the great ground conductivity in ND but not FM.
I'm used to AM traveling a long ways with the great ground conductivity in ND but not FM.