Nick Heil is a contributing editor at Outside magazine and author of Dark Summit: The True Story of Everest's Most Controversial Season. He lives in Santa Fe, N.M.

Trouble at the Top

Commercial climbing on Everest is in trouble as the mountain’s two biggest problems—the number of climbers and the deteriorating conditions—have expanded beyond anyone’s control.

Ultra-marathon legend Micah True, a.k.a. Caballo Blanco, went out for a run and never returned. Nick Heil on what happened.