Discover the ‘Trembling Giant’ Pando, the World’s Largest Living Organism

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Home » Ancient & Remarkable Trees » Discover the ‘Trembling Giant’ Pando, the World’s Largest Living Organism

The Pando tree, also known as the “Trembling Giant,” is a remarkable symbol of resilience and interconnectedness in nature, located in Utah’s Fishlake National Forest.

This vast clonal colony of approximately 47,000 Quaking Aspen trees, potentially up to 80,000 years old, stands as one of the oldest and most massive living organisms known.

Pando is recognized as a single entity due to the identical genetic markers found in each of its stems.

Pando the world's oldest organism, a grove of Populus tremuloides (Quaking Aspen)
Fall photo of world’s oldest organism, Pando, a grove of Populus tremuloides (Quaking Aspen)
by J Zapell, Public domain, via Wikimedia Commons

This immense network of interconnected roots manages the distribution of energy, defense mechanisms, and regeneration processes throughout its vast span.

Its significance extends beyond its impressive age and size; Pando represents a critical example of ecological stability and the delicate balance within ecosystems.

Through its continued growth, Pando underscores the importance of conservation and the complex web of connections that support life on Earth.


Located in the Fishlake National Forest in central Utah, USA, near the shores of Fish Lake, the sprawling organism known as Pando covers about 106 acres.

This clonal colony of Quaking Aspen, notable for its immense size and age, resides in the Fremont River Ranger District, close to the small town of Richfield.

Type of Tree

Pando is a clonal colony of Quaking Aspen (Populus tremuloides).

Aspen Trees in the Pando Clone
Aspen Trees in the Pando Clone

Is Pando Still Alive

This massive clonal colony of Quaking Aspen, is still alive.

This remarkable organism, often described as the largest living organism by mass, has been thriving in the Fishlake National Forest in Utah for thousands of years.

How Old Is Pando

Estimates of Pando’s age vary widely, with some scientists suggesting it could be several thousand years old, while others propose ages as high as 80,000 years.

Determining the precise age is challenging due to the organism’s continuous cycle of death and renewal; however, its vast expanse and genetic uniformity indicate a long history of growth and survival.

Can You Visit It?

Yes, you can visit Pando. This unique natural wonder is located in the Fishlake National Forest in Utah, USA, and is accessible to the public.

Visitors to the area can enjoy a variety of recreational activities, including hiking, wildlife viewing, and photography, all while experiencing the remarkable sight of what appears to be a vast forest of Quaking Aspen trees that are, in fact, all part of a single organism.

There are signs and information available on-site to help visitors understand the significance and history of Pando.

It’s a popular destination for those interested in nature, conservation, and the outdoors, offering a unique opportunity to witness one of the most extraordinary examples of a clonal colony in the world.

Pando Aspen Clone in Winter at Fishlake National Forest
Pando Aspen Clone in Winter at Fishlake National Forest


Pando faces threats from overgrazing, and human interference, which impair its natural regeneration processes.

Efforts to protect Pando involve fencing, monitoring, and research initiatives aimed at understanding its ecology and promoting its growth.

These actions underscore the importance of safeguarding such unique natural phenomena, highlighting the delicate balance between human activity and the preservation of ancient living systems.


Spanning over 106 acres in Utah’s Fishlake National Forest, this vast clonal colony of Quaking Aspen embodies an unparalleled natural legacy, capturing millennia of ecological history and resilience.

As a subject of ongoing protection and research efforts, it serves as a vivid reminder of nature’s complexity and the urgent need for conservation to safeguard such irreplaceable treasures for future generations.

Want More?

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Fern Berg - Founder

Expert Gardener & Horticulturist in Training

Fern has planted and currently cares for over 100 different native and exotic fruit, nut, and ornamental trees. She also cultivates an extensive vegetable garden, several flower gardens and cares for an ever-growing happy family of indoor plants. Fern has a special interest in biodynamic farming, food production and closed loop agriculture. Fern founded Tree Vitalize to help guide others with an interest in tree planting, identification and care.