Boole, Giant sequoia in Converse Basin Grove, Giant Sequoia National Monument, California, USA

The Boole Tree is a giant sequoia in Converse Basin Grove, within Giant Sequoia National Monument, Fresno County, California. Its reddish-brown, grooved trunk rises 268 feet (82 m) and measures 113 feet (34 m) around the base, the widest of any giant sequoia. The lower half is mostly bare, while the upper crown spreads broadly with dense dark green foliage above the surrounding conifers.

Franklin A. Boole saved this tree at the turn of the 20th century while loggers were clearing surrounding forests. His choice to preserve it made it a rare survivor of an era of heavy forest use.

The tree represents efforts to protect giant sequoias and reminds visitors why old forests matter for conservation. People come to see how these massive trees survived despite the heavy logging that once swept through the region.

Hiking trails guide visitors through the area to reach this tree in Sequoia National Monument. It is wise to wear good hiking boots and prepare for high elevation and changing weather conditions.

This tree stands out for its exceptionally thick trunk, the widest among all giant sequoias. This unusual proportion makes it distinctive compared to other giant sequoias in the region.