A heartbroken dad is speaking out after his daughter died while they hiked Yosemite’s Half Dome. Grace Rohloff was hiking with her dad. Johnathan Rohloff tells Inside Edition his daughter had checked the forecast. When they made it to the top, a storm appeared out of nowhere. It began to pour during their descent. Unfortunately, she slipped off the side. As Jonathan Rohloff mourns his daughter's death, he says he will now work to make Half Dome a safer adventure.