Based on what I saw at Holiday Valley this weekend, that premise is false.
Yes it was early season and only the diehards were out. But to my eyes most of the folks out skiing were us old diehards! Virtually every person I went up the chair with was over 50 including myself who had just turned 60. I even met a couple of black skiers from Buffalo enjoying the early season.
But I do get what the article means. If we are really being honest, based on the general population of the US, only a very small sample of the black population skis. I do believe this is more cultural than anything else. It is what you are exposed to and inner city black youth get exposed to basketball, football and baseball, not skiing. They follow their sports hero's into the sports they are famous for and skiing just ain't one of them. There are exceptions of course. Here in Cleveland there are a couple of black ski clubs, but I do understand that is an exception rather than a rule.
But, I think the stereotype of skiing as a "white" sport is just as strong in the black community as it is in the white community. I have a good friend who just so happens is black. He grew up in the ghetto but was plucked out for a special program that put him in a nice white middle class school and got a good education. We have had many insightful race conversations. A couple of years back after telling him about yet another epic ski vacation, he looks at me with a quizzical look on his face and blurted out, "Rick, I got to ask you something. Do Black people ski? You know, we don't like the cold!" At which point we both broke out laughing at the socially accepted stereotype that White people ski in the winter, Black people play basketball indoors where it is nice and warm.
The stereotype is strong on both sides.