A solo trail run offers up an exciting adventure and a temporary escape.
Yikes! A runner encounters a mountain lion out on the trails.
Five trail runners helped extinguish a wildfire.
An elite runner mistakenly dominates the kids' wave of a rugged uphill mountain race.
Trail Sisters founder Gina Lucrezi is spreading the gospel of trail running.
Kilian Jornet still wants to win trail races, but he wants more than that.
Part trail running, part mining heritage, pack burro racing is a true Colorado sport.