Black Mountain in Kentucky is generally reported as 4,145 feet at the summit, though some Kentucky sources use 4,139 feet for the high-point marker or conservation easement description. The mining article I found says the mountain’s summit was “over 4,000 feet” before strip mining, but it does not give a precise pre-mining height for the mountain itself.

What can be said confidently

  • Highest point today: 4,145 feet, according to USGS-based references.
  • Some state materials: 4,139 feet, likely reflecting a specific marked point or administrative description rather than the surveyed summit.
  • Before strip mining: the available source only states the summit was over 4,000 feet before mining, not an exact pre-strip-mining number.

Plain answer

If you mean the mountain’s summit before strip mining , the safest answer from the available source is: a little over 4,000 feet, and probably around 4,145 feet at the true summit.

TL;DR: Black Mountain’s true summit is about 4,145 feet , but I could only verify that it was over 4,000 feet before strip mining—not an exact earlier figure.