President Abraham Lincoln signed the Yosemite Land Grant on this date in 1864. According to the Library of Congress:
The legislation provided California with 39,000 acres of the Yosemite Valley and the nearby Mariposa Big Tree Grove “upon the express conditions that the premises shall be held for public use, resort, and recreation.”
The newly-appointed Yosemite Board of Park Commissioners confronted the dual task of preserving the magnificent landscape while providing for public recreation. With amazing foresight, board member and landscape architect Frederick Law Olmsted noted these goals could conflict. In his August 9, 1865 Draft of Preliminary Report upon the Yosemite and Big Tree Grove, Olmsted warns “the slight harm which the few hundred visitors of this year might do, if no care were taken to prevent it, would not be slight, if it should be repeated by millions.”