The Grizzly Giant is the oldest sequoia in the Mariposa Grove, the largest giant sequoia grove in Yosemite National Park, with several hundred mature specimens. At one time, the Grizzly Giant was considered the oldest and largest tree in the world, aged between 2,000 and 3,000 years.

The 2000-year-old tree in Yosemite National Park is the Grizzly Giant, located in the Mariposa Grove of Giant Sequoias. While it is not the oldest tree in the world (some Bristlecone Pines are over 4,000 years old), it is one of the most iconic and massive living organisms on Earth. Scientists estimate its age to be approximately 2,700 years, plus or minus a few centuries. The Grizzly Giant stands about 209 feet tall and has a base diameter of 28 feet. One of its most striking features is a massive limb on its south side that is over 6 feet in diameter—larger than the trunks of most non-sequoia trees. The tree has survived countless forest fires over two millennia, with the "scars" on its bark telling a story of resilience. In 2026, the Mariposa Grove remains a protected sanctuary, with the Grizzly Giant serving as the centerpiece of a forest that was the very first land in the U.S. set aside by the federal government for public preservation and recreation.