Genesis, Giant sequoia in Mountain Home Grove, Sequoia National Forest, California, US

Genesis is a giant sequoia in Mountain Home Grove, within Mountain Home Demonstration State Forest in the Sierra Nevada of eastern California. Measured by Wendell D. Flint, it reaches 86.2 m in height and 24.04 m in circumference at 1.37 m above the base. It is the largest tree in the grove and the seventh largest in the world.

Wendell Flint and Mike Law found and named the tree in 1985 while searching for large trees in the Sierra Nevada. They measured a previously undocumented giant sequoia in Mountain Home Grove, slightly smaller than the Boole Tree but with a thinner base and a larger trunk. It proved larger than the Franklin Tree, then the world's seventh largest, making Genesis the seventh largest tree overall and the largest in Mountain Home Grove.

The name Genesis comes from the first book of the Bible, given by Wendell Flint and Mike Law when they documented the tree in 1985. It is the largest tree in Mountain Home Grove, a grove that also holds other named sequoias such as Adam and Methuselah. Visitors can see the tree's burnt base from the 2020 Castle Fire.

Genesis stands in Mountain Home Grove within Mountain Home Demonstration State Forest, in the Sierra Nevada east of California's Central Valley. The grove lies off the forest's road network, and the tree's volume has not been measured since the 2020 Castle Fire, so expect burned ground and fallen debris near the base. Check current forest access before setting out.

The 2020 Castle Fire damaged Genesis severely enough that its crown is now noticeably lower than it used to be. The fire damage is visible when you look up at the tree, yet it still stands and continues to grow.