Mark Twight

Mark Twight, born on 2 November 1961, is an American climber and writer who founded the training gym Gym Jones. He rose to prominence as a mountaineer in the late 1980s and early 1990s through a series of difficult and dangerous alpine climbs in several mountain ranges around the world. His radical, light-weight approach to alpinism, in which a climb is made in a single push, has led to him being regarded as an influential figure in the single-push movement within mountaineering.