Walking the icy flanks of Mount Baker — an active volcano in Washington State and one of the highest peaks in the Cascade Range — is probably one of most untainted wilderness experiences. And yet, it feels profoundly unnatural to me as I trudge up an oblique sheet of ice with crampons lashed to my boots and an ice axe hefty enough to clobber a mountain goat or a yeti gripped tightly in one hand. When I stop to fumble with my backpack and readjust my borrowed, baggy rain pants, which are failing to keep moisture from penetrating the innermost layers of my clothing, Mauri Pelto, the glaciologist who has brought me here, offers me a reprieve. “As we head into this icefall, you have to let me know,” he says quietly. “Maybe it’s just not the place for you.”