Trent Nelson | The Salt Lake Tribune Hikers on the Canyon Overlook Trail, Zion National Park, Tuesday May 5, 2015.Trent Nelson | The Salt Lake Tribune Hikers on the Canyon Overlook Trail, Zion National Park, Tuesday May 5, 2015.Trent Nelson | The Salt Lake Tribune Hikers on the Canyon Overlook Trail, Zion National Park, Tuesday May 5, 2015.Trent Nelson | The Salt Lake Tribune Hikers on the Canyon Overlook Trail, Zion National Park, Tuesday May 5, 2015.