John Long (born 1959) is an American rock climber and author. A 1971 graduate of Upland High School in Upland, California, he was a weightlifter and one-time divinity student at Claremont School of Theology.

Long joined then unknown climbers John Bachar, Rick Accomazzo, Richard Harrison, Tobin Sorenson, Rob Muir, Gib Lewis, Jim Wilson, and Mike Graham as founding members of an elite group known as the "Stonemasters" putting up daring new routes in Idyllwild, California area in the 1970s.

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