The Giant Sequoia National Monument is a 328,000-acre U.S. National Monument located in the southern Sierra Nevada in eastern central California. It is administered by the U.S. Forest Service as part of the Sequoia National Forest and includes 38 of the 39 Giant Sequoia groves that are located in the Sequoia National Forest, about half of the sequoia groves currently in existence, including one of the ten largest Giant Sequoias, the Boole Tree, which is 269 feet high with a base circumference of 112 feet.