Hopefully Bin can find a link to the map he referenced.
Here are some figures from UND's Big Sky announcement...
Number of UND Alumni Within 100 Miles of Big Sky Campuses:
Greeley, Colorado: 2,865 (Denver area: 3,301)
Sacramento/Davis, California: 1,578
Portland, Oregon: 1,178 (Seattle area: 2,204)
Spokane, Washington: 456
Missoula, Montana: 445
Bozeman, Montana: 365
Ogden, Utah: 362
San Luis Obispo, California: 285
Flagstaff, Arizona: 160
Pocatello, Idaho: 144