The popular climbing campsite, Camp Muir, is also a hiking base. People start on the Skyline Trail, walking more than four miles and climbing more than two miles to Muir Snowfield. The hike is exhausting, and by the end, people’s legs feel like jelly. This is a not a good state when a severe storm suddenly forms, dumping snow, and forming blinding fog. This can turn the area into a death trap, where many people have died.