YOSEMITE NATIONAL PARK, Calif. (AP) — Two skiers navigated a thin layer of snow with no margin for error down the precipitous shoulder of Half Dome in Yosemite National Park and alternately skied and rappelled back to the valley floor in an unusually daring feat.

Jason Torlano, 45, and Zach Milligan, 40, completed the descent in five hours Sunday by carefully carving their way in crusty snow and using ropes to rappel several sections of bare rock known as the "death slabs" beneath the iconic face of Half Dome, the Fresno Bee reported Thursday.

"If you fall to your left or right, you're definit...