Pando (or The Trembling Giant) is a clonal colony of a single male Quaking Aspen located in the U.S. state of Utah, all determined to be part of a single living organism by identical genetic markers and one massive underground root system, although whether it is a single tree is disputed. The plant is estimated to weigh collectively 6,000,000 kg (6,600 short tons),making it the heaviest known organism. The root system of Pando is estimated to be among the oldest known living organisms in existence at 80,000 years of age.
Pando is located in the Fishlake National Forest, near Fish Lake on the Fish Lake Plateau located at the western edge of the Colorado Plateau in South-central Utah. The name "Pando" was chosen because it is Latin for "I spread."