A boy walks through Mariposa Grove with Giant Sequoia trees Yosemite National Park in California November 24, 2008. Mariposa Grove is a sequoia grove located near Wawona, California in the southernmost part of Yosemite National Park. It is the largest grove of Giant Sequoias in the park, with several hundred mature examples of the tree. Two of its trees are among the Twenty Five largest Giant Sequoias in the world. The Mariposa Grove was first visited by non-natives in 1857 when Galen Clark and Milton Mann found it. They named the grove after Mariposa County, California, where the grove resides [1]. (Photo Copyright Alan Greth)