About 770 miles.
The driving distance from Franklin, Kentucky to Park City, Utah is 1638 miles via I-80 W per MapQuest. The driving time per MapQuest is 23 hours and 26 minutes.
It is 520 miles according to Google Maps.
250 miles
You can park as far away as you want. However you should never park closer than 10 feet.
Fenway Park is 6.5 miles away via MA-1A South.
That would be about 298 miles from Saint George to Salt Lake City Utah.
Zion National Park is in the South West corner of Utah, not far from St George.
About 2,085 miles.
1895 miles
The fastest and shortest route suggested by Google Maps using US-6 is 650 miles.
The distance is 77.8 miles or 1 hour and 17 minutes driving.