Kansas City, Missouri.
Amarillo, TX
lubbock
I believe that would be Livingston or Bozeman
A rough estimate would be Amarillo, Texas.
Knob Hill, TX.
what is the halfway point between Deer Park, Wash. And Hot Springs Montana
Assuming you mean what town is halfway between Denver and Galveston. A small town named Childress is halfway, but the closest larger towns are Amarillo or Wichita Falls
San Angelo is somewhat in between Amarillo and South padre island.
A city halfway between Billings MT & Chicago IL could be Sioux Falls SD, depending on your route.
The halfway point is Clarendon, TX. I would stay in Amarillo.
One big city that is halfway between California and Ohio is Amarillo, TX. Another is Oklahoma City, Oklahoma. Not as big but almost exactly halfway is Elk City, Oklahoma.