The Boole Tree trailhead is approximately 4.2 miles north of Grant Grove Village (east) on Highway 180 to FS Road 13S55. The trail begins at the parking area and heads uphill through a mixed forest of lodgepole, western white, Jeffrey, and sugar pines. At a T-junction, the trail makes its final decent to the sixth largest giant sequoia in the world, the Boole Tree. Distance: 2.25 miles, loop.