The trails in the Mist Trail Corridor are the busiest in Yosemite National Park. This historic trail corridor features legendary trails and landmarks, such as the Happy Isles, the John Muir Trail, the Mist Trail and the Half Dome Trail, Vernal Fall and Nevada Fall, and Half Dome. Since 2010, in the summer, an average of 85,000 visitors use the trailhead near Happy Isles. From mid-May to mid-October, up to 300 permit-holding hikers ascend the Half Dome Cables route. High levels of visitation contribute to this trail corridor being the busiest area of the park for visitor accidents and fatalities. In turn, these trails have high rates of search and rescue operations, which puts rescuers and park staff at risk.
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