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After surviving 9/11 at ground zero, the thru-hiker started walking—and never stopped

She knew she was going to be the best triathlete in the world one day. But first she had to learn to swim.

Retreating from a wildfire during a backpacking trip inspired the nonprofit founder to share climate change’s impacts on nature with others

Facing the loss of a close friend, the Kenyan cyclist and road-safety advocate found refuge in his community

Losing his lower legs to disease in childhood caused him to hide himself for decades. Then a long, hot hike across the Grand Canyon showed him a new way forward.

More than 50 years ago, this 20-year-old became the first woman to officially run the Boston Marathon, even while organizers tried to pull her off the course. She finished—and started a movement.