There's a general perception in the outdoor recreation community that the black community simply doesn't go outdoors. Instead, it's a "white thing...
Our natural heritage is just that, our natual heritage, but as a country the outdoors are seen as a typically white and often times male domain.
Merely inviting a more diverse audience to enjoy the outdoors is a great start but it seems likely that having more role models for diverse populations would help others accept these kinds of invitations more readily.
Last month I was on a panel at the Outdoor Retailer Winter Show about diversity in the outdoors. It was a broad discussion about how we get more Americans of different colors, philosophies, religions, back grounds, socio-economic positions, and age outside.