Outdoor, Field, Trees, and Shrubs Black Shack Architects designed a modern motocross shelter in an elemental way. When Glenn Rappaport’s long-time client approached him to design a shade structure along a private motocross track in El Jebel, Colorado, he was inspired by the elemental nature of the project. The family, with three teenage boys, wanted a shelter that would provide protection from the elements, a small changing area, restroom, fire pit, and storage for cold drinks.  Photo 1 of 7 in Rock, Paper, Scissors