But in a freak accident July 19 walking just a few steps ahead of the others on a mostly paved old stagecoach road, Angela was struck and killed by a falling tree limb. Her family believes the heavy branch — the width of a tire rim — likely killed her instantly.

The trails of Tuolumne Grove, a popular site in Yosemite National Park, wind through forests of pine and giant sequoias, the largest trees on earth. On July 19, after hiking about a mile into the grove, Angela Lin, 29, and her friends heard a snapping sound above them.

Back in August 2015, two high school students were asleep in a tent in the Upper Pines Campground when an oak limb fell, killing them both. And in 2012, a concessions worker was killed when a tree fell on his tent cabin during a windstorm.