Mariposa Grove, reached via Wawona Rd. (SR 41), is in the extreme s. end of the park; the easy 36-mi. paved drive from Yosemite Valley is closed to vehicles during winter and spring.
This giant sequoia grove is one of the finest in the Sierras. The oldest tree, Grizzly Giant, has a base diameter of 30.7 feet, a girth of 96.5 feet and is 210 feet high; the 232-foot California Tree is a walk-through tunnel tree. The other tunnel tree in the park, the 40-foot stump Dead Giant, is in Tuolumne Grove.
Mariposa Grove Museum has exhibits about giant sequoias. During the summer a naturalist gives talks. Nearby is the fallen Massachusetts Tree, 280 feet long and 28 feet in diameter; several broken sections provide opportunities to study the wood. Guided bus tours run from the valley to the grove, with a stop in Wawona. An overlook at the 4,233-foot Wawona tunnel offers a view of the entire valley. A 2.5-mile hiking trail leads to the upper grove, where vehicles are not permitted.
Note: Due to a restoration project Mariposa Grove and Mariposa Grove Road are closed until approximately fall 2017. Phone ahead for reopening information.