100 miles away appears to be the edge of the spotbeam. Would a larger dish aimed at the 129 generate enough signal to pick up the spot beamed signal?
I have an older dish I used for the 61.5 when I lived in New England. It generated a much higher signal than the original normal size Dish freebe.
You would need something fairly large. Probably 6 -8 foot diameter antenna for the approximate 35 dBw Denver signal in that area.