Skijoring in the Highest Incorporated City in America

Skijoring is not for the faint of heart. It takes unparalleled grit and fortitude to be pulled by a horse at a jarring 40 miles per hour, performing stunts on skis, flipping through the frosty air, collecting strategically-positioned rings for more points while trying your damndest to stay on course.

The skijoring pro circuit makes stops in Wyoming, Montana, Utah, and Idaho. But in Leadville, Colorado -- two hours outside of Denver -- it's an unforgiving pitstop: Leadville is the highest-elevated...