How Old Is the Oldest Tree in the World?

If you ask how old the oldest tree in the world really is, your gut probably says a few hundred years. Maybe a thousand. Spoiler: it is 4,855 years old. That tree was already a full-grown adult when the Egyptians started stacking stones for the Great Pyramid. Its name is Methuselah, it lives high in the mountains of California, and the U.S. government will not tell you exactly which tree it is. We will show you where it grows, why it has lived so long, and which living thing might actually be way older.

How old is the oldest tree in the world really?

The oldest single tree in the world is called Methuselah. It is a Great Basin bristlecone pine (Pinus longaeva) growing in the White Mountains of eastern California. When researchers cored it in 1957, they counted 4,789 rings. Today it is around 4,855 years old. For context: the Great Pyramid of Giza was built about 4,600 years ago. Methuselah was already 250 years old at that point. It has watched ancient Egypt, the Roman Empire, and every world war come and go.

Why is the location of Methuselah a secret?

The exact spot where Methuselah stands is officially classified. The reason traces back to a sad story from 1964. A young grad student named Donald Currey was studying another bristlecone pine in Nevada. The tree was named Prometheus. Currey wanted to measure its age. His coring tool snapped inside the trunk. Instead of fetching another one, he asked the U.S. Forest Service to cut the tree down so he could count the rings on the stump. The count came back: at least 4,862 years, possibly over 5,000. A grad student had just accidentally killed the oldest known tree on Earth.

Lesson learned. When a tree is that old, you do not want anyone to know exactly which one it is. Tourists could chip off bark. Souvenir hunters could saw off branches. So the Forest Service still refuses to mark Methuselah on any map. You can visit the grove. You can walk among the ancient twisted trunks. But which one is the oldest? Only a handful of people know.

Why do bristlecone pines live this long?

Bristlecone pines grow in one of the harshest places in North America. At 9,500 to 10,000 feet (2,900 to 3,000 meters) up in the White Mountains, the air is freezing, the soil is dry, the wind is brutal, and the growing season is tiny. That sounds awful, but it is exactly the secret. The cold forces the tree to grow extremely slowly. Its wood becomes dense, packed with resin, and almost completely resistant to fungi, beetles, and rot. Most trees rot from the inside out long before they hit 1,000 years. A bristlecone pine is essentially a slow-motion fossil that is still alive.

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Is anything alive today actually older than Methuselah?

Yes, and this is where it gets weird. In Utah, a quaking aspen colony called Pando looks like a regular forest from above. It is not. All 47,000 or so trunks share one root system and identical DNA. They turn yellow at the same time in fall. Pando weighs an estimated 6,000 metric tons (about 13 million pounds), making it the heaviest known living thing on the planet. It covers about 106 acres, roughly the size of 80 American football fields.

Pando's age is hotly debated. Estimates range from around 14,000 to as much as 80,000 years. A 2024 genetic study suggested a younger figure, with some researchers landing closer to 9,000 to 12,000 years. Even at the low end, that makes Pando more than twice as old as Methuselah. Sweden also has a famous spruce called Old Tjikko. Its visible trunk is only a few hundred years old, but the underground root system is estimated to be roughly 9,500 years old. Clonal organisms like Pando and Old Tjikko count as one living thing, even though the part you can see is young.

Methuselah or Pando: which one really wins?

The honest answer is: it depends on how you count. If you mean the oldest single tree with one measurable trunk, Methuselah wins at 4,855 years. That number comes from physically counting tree rings, the gold standard. If you mean the oldest single living organism, Pando wins at 14,000 years minimum, possibly 80,000. That number is an estimate based on DNA and ice age climate data, not direct counting.

Both answers are correct. The science is clear: Methuselah is the oldest non-clonal tree, Pando is the oldest clonal organism. So if a quiz tells you the oldest tree in the world is 4,855 years old, that is true. If someone says 80,000, that is also defensible. It just comes down to one question: do you count one trunk, or one entire root system?

If you enjoy these kinds of nature records, check out our deep dive on Animal Superlatives: 15 Records That Redefine the Limits of Life. Same vibe, different kingdom.

Trees can outlast every culture, every empire, and every country on Earth. Methuselah was already old when the pyramids were still sand, and Pando may have been alive since the last ice age. If facts like these light up your brain, try our nature estimation questions. You will be surprised how often your guess is way off.