By Michael Lanza
I am floating in the stratosphere.
The feeling reminds me of childhood dreams of flying, but this is no dream. We are hiking across the slender, granite spine of 9,926-foot Clouds Rest, between sphincter-puckering abysses of deep air in the heart of Yosemite National Park. Below my left elbow, the rock drops off like a very long and insanely steep slide for several hundred feet before reaching forest; and that’s the side that feels less exposed. Below my right elbow, a cliff face sweeps downward a dizzying, stomach-churning 4,000 feet—that’s a thousand feet taller than the face of El Capitan.