29 miles up I-77. The exit for Troutman is EXIT 42 (U.S. 21/NC-115).
It ia 55 miles according to Google Maps.
About 3 hours
Mt. Holly is right outside of Charlotte.
about 200 miles
You did not specify which Spartanburg was being referred to, so:Spartanburg, IN to Charlotte, NC is approximately: 511.82milesSpartanburg, SC to Charlotte, NC is approximately: 74.24miles.
around 250 miles
244 miles
It is approximately 242 miles from Bluffton, SC to Charlotte, NC
The address of the Troutman Historical Association Inc is: Post Office Box 1, Troutman, NC 28166
143 miles up I-85.
160 miles
It is 1,562.63 miles according to MapQuest.