How well do stations east of the Rockies come in. I think those big giant mountains would be in the way of a lot of them.
As mentioned in an earlier thread, back between 1959 and 1963 when I lived in NE Ohio, I heard these LA area frequencies there:
570, 640, 710, 740, 790, 930, 980. 1020, 1070, 1110, 1150, 1190, 1280, 1330, 1390, 1480, 1540, 1580, 1600.
Mountains are really not in the way of AM skip, unless they are a nearby barrier. For example, when I lived in Quito at 9800 feet there were 13,000 to 14,000 foot mountains just a few miles to the west of where I lived. So I never heard Hawaii, Australia, New Zealand and the like. But I did hear many countries from Europe and Africa, and a bunch of Class IV 250 watt US "graveyarders" from the Dakotas, Montana and surrounding states.