Skate skiing is one of the most phenomenal physical activities I know, and the GoPro Hero 3 video camera is the first camera I know that can capture the pure joy of the sport. I strapped my  GoPro to my head and captured the eye-popping scenery of the Methow in mid-February with my friend who lives there. Uphill is great for the lungs and legs, but downhill is what appeals to the brain’s chemistry.