Kinder grew up in Manchester, N.H. On a family reunion trip to Colorado when he was about 13, his parents gave him and his older sister Becky a choice of activities. Becky chose whitewater rafting. He chose rock climbing, took his first lessons and learned he was good at it — so good that the instructors gave him more challenging routes than others in the class. Back in New Hampshire, he began tackling local cliffs. When he wasn’t outside challenging mountains, he was reading magazines or watching movies about rock climbing.