It could be that the hill presented a problem . In the past, nigger was sometimes used as a synonym for "defect", deriving from the phrase "nigger in the woodpile", which originally referred to escaping slaves hiding among woodpiles being transported on trains. It came to mean some unseen problem.
Or it could be in relation to it looking in a particluar way. Because the word was used freely for many years, there are many official place-names containing the word nigger. i.e
"Nigger Bill Canyon, Nigger Hollow, and Niggertown Marsh".
In 1967, the United States Board on Geographic Names changed the word nigger to Negro in 143 specific place names, although this did not always eradicate common use of the word in reference to such places. One specific example is that of Nigger Head Mountain, located just outside of Burnet, Texas. For decades, a particular hillock was referred to as such due to the forestation at the peak resembling a black man's hairstyle of the times.
Crazy Stuff, but then it a historical part of our heritage. No matter how wrong we were i dont belive they should be changed.
Over 5000 years of Wirral History: