“Why have I never used these before?!” I quietly exclaimed to myself as I skipped down the side of an ice-covered ridge in Yosemite National Park. Rather than boulder-hopping and mountain-goating from stone to stone as I had on my way up the mountain, I was suddenly free to move, parading over frozen streams and mini-waterfalls with the grace of a Bolshoi dancer. The reason? Microspikes.