18 hours
Utah is much further west than Iowa. Driving from Iowa to Utah you would drive through Nebraska and Colorado.
Nebraska is the only US state that borders both Colorado and Iowa.
Forrest Damewood was born on June 2, 1901, in Iowa, USA.
"North of Iowa" is pretty vague... WHERE north of Iowa? In an 18 wheeler, it would take me about 10-1/2 hours to get from Sioux Falls to Denver.
It is 9 hours and 43 minutes accordng to MapQuest.
Forrest Westering was born on December 5, 1927, in Missouri Valley, Iowa, USA.
Omaha is MUCH closer to Iowa than Colorado - as Omaha sits on the Missouri River, which is the dividing line between Nebraska and Iowa. Colorado is several hundred miles to the west.
Kentucky, west northwest to Colorado and north to Iowa.
Nebraska has a south-western border with Colorado and eastern border with Iowa.
According to Google Maps, it's about 640 to 660 miles from Colorado Springs to Harlan, Iowa, depending on which route you take.
It is 786 miles according to Google Maps.