I hike a lot, and have very rarely ever seen a black hiker. Thus, racism. Must be. That's the only explanation. Yep.
I can remember seeing minorities on "trails" to sights like the couple hundred yard walk to an observation platform, or up to a waterfall. That's not real hiking. In places like that it's always the kids (white and minority) that are yelling, talking loud, running around off-trail, and in general shattering the serenity of the place.
Of course just because I like to do something and apparently few minorities enjoy it - it must be my fault... ;-/
I think it all depends on the area. Some trails here in TN, especially in the Smokey's there can be quite a bit of diversity. Not so much on longer trails or smaller parks though. Personally, I could care less; but I do find many of the 'trail runners' to be an annoying lot.