Hundreds of spectators gather along a snow-covered historic street in a Colorado town to watch horses and riders pull skiers along an obstacle course. Skijoring, which has its origins as a competitive sport in Scandinavia, has been adapted over the years to include a team made up of a rider and skier who must navigate jumps, slalom gates, and the spearing of rings for points. Leadville, with an elevation of 10,152 feet (3,094 m), the highest incorporated city in North America, has been hosting skijoring competitions since 1949. IMAGES AND SOUNDBITES