The closest thing I can find is a reference to a "Pea Ridge" Highway in Union County, SC. (No "Pear" Ridge, though.) Maybe it's one of those places that vanished. I found the highway on Google maps, but not really as a specific place. Google maps located the highway in Jonesville, Union County, South Carolina. There appears to be an actual place in NORTH Carolina called Pea Ridge.
"Pear Ridge" mostly brought up Dallas, Texas.
None of this is probably very helpful, but I thought I'd mention it for discussion's sake. Maybe there's something to be found in either Union County, South Carolina, or in North Carolina. I don't know my history/geography very well -- did the borders change over the years to skew the search in modern times?
*(I see that Richard Shelley beat me to the North Carolina idea)
Reba