Cross-country skiing is as much of a competitive sport, as it is a back country one.  Cross-country skiing is enjoyed by people of all ages, and can be relatively inexpensive.  There is no need for lift tickets and with a little maintenance equipment can last for decades.  As a result of its broad audience, many people don't realize that physics plays a large role in cross-country skiing.  This web page was designed to briefly describe some of the concepts behind the physics of skiing, and give a basic understanding of both the sport and the science.