In this Thursday, June 15, 2017, photo, Jake Gustafson crosses wading chest-deep in still waters with his backpack over his head at Evolution Creek along the Pacific Crest Trail near Kings Canyon National Park, Calif. With hundreds of so-called thru-hikers entering the high Sierra early in the season, their experiences serve as a cautionary tale for others planning weekend or summer wilderness escapes. More than a dozen people have drowned in Sierra rivers at lower elevations, including one in Yosemite and three in Sequoia National Park, and rangers are warning hikers to think twice about crossing swift water. (Wesley Tils via AP)
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