National Geographic : 1936 Mar
CALIFORNIA-85 YEARS AFTER THE GOLD RUSH © National Geographic Society Finlay Photograph by U. Anthony Stewart "GRIZZLY GIANT," OLDEST TREE IN MARIPOSA GROVE, IS NEARLY 100 FEET IN GIRTH Though living tree ages may be determined by core borings, this stalwart sequoia's exact life span has not been fixed. Park officials estimate it at 3,800 years. In the grove also stands the tallest of all Big Trees, the "Mark Twain," towering 331 feet-127 feet higher than the "Grizzly Giant." Visitors entering Yosemite National Park from the south reach Mariposa Grove over the Wawona Road.