By late April, Marcus Mazzaferri had already hiked nearly 1,000 miles of the Pacific Crest Trail. He was just about to stop for the day near Tuolumne Meadows, high in Yosemite National Park, when he came across a swollen creek and decided to cross it before setting up camp. What happened next left Marcus all alone, with no gear, 15 miles from the nearest road. His story will make you wonder: What would I have done?

The Sharp End is produced each month by Accidents in North American Climbing, an annual publication of the American Alpine Club, and is presented by Mammut, with additional support from Vertical Medicine Resources and Colorado Outward Bound School.