Phoenix, AZ.
Oklahoma City is a halfway point between Ironton, Ohio and Phoenix, AZ.
On a map, it looks to be close to Eagle Mountain.
Fort Hancock, TX
Panhandle, TX
The Oklahoma state line after you leave Missouri.
Stotts City MO
Seguin, TX outside San Antonio
From Phoenix AZ to the Painted Desert in Apache AZ is 186 miles and the halfway point would be near Payson Arizona in the Tonto National Forest at 89.6 miles from Pnoenix according to Google Maps. There is a limited choice of dining and rooms, but it is a pleasant and friendly piece of small town Southwestern America.
Where is the halfway point between Tucson AZ and Columbus, IN?"
The halfway point between Kingman, AZ and Sacramento, CA falls in or around Keene, CA.
Kingman