In mountaineering and climbing, enchainment is climbing two or more mountains or climbing routes on a mountain in one outing. Rock climbing two or more routes in this manner are also called a "link up" in the United States. Climbers may do an enchainment of easy routes as a way of training for a more difficult objective, but some enchainments of hard routes are a prize in their own right, a notable example being the great north faces of the Alps.

Jean-Christophe Lafaille was a French climber noted for a number of difficult ascents in the Alps and Himalaya, and for what has been described as "perhaps the finest self-rescue ever performed in the Himalaya", when he was forced to descend the mile-high south face of Annapurna alone with a broken arm, after his climbing partner had been killed in a fall. He climbed eleven of the fourteen eight-thousanders, many of them alone or by previously unclimbed routes, but disappeared during a solo attempt to make the first winter ascent of Makalu, the world's fifth highest mountain.