450	A. D. Fire.
1652	Fire.
1690	Fire.
1710	Fire.
1742	Fire.
1803	Fire.
1809	Fire.
1842	Fire.
1849	Major Burney and John Macauley report Big Trees east of Chowchillas.
1857	Galen Clark discovered and explored the Mariposa Grove.
1862	Fire.
1854	Grove and Yosemite Valley became a California State Park. Galen Clark made guardian of the grove and Yosemite Valley.
1858	John Muir made his first visit to Yosemite.
1873	Fallen Giant fell.
1881	Tunnel cut through Wawona Tree by Yosemite Stage and Turnpike Co. at a cost of $75.00.
1885	State Board of Commissioners built a cabin as replica of Galen Clark’s old one.
1889	Fire threatens grove.
1895	Tunnel cut in California Tree (near Grizzly Giant).
1902	Old cabin enlarged to accommodate curio shop.
1906	Mariposa Grove and Yosemite Valley re-ceded to United States. U. S. Army administered the areas.
1914	Civilian employees replaced Army in administration of park.
1916	National Park Service established by Act of Congress.
1927	Massachusetts Tree fell.
1930	Present museum constructed as replica of former cabin.
1932	Road rerouted around the Grizzly Giant.
1934	Stable Tree fell August 28.
1934	More than 15,000 seedlings and saplings counted in north section of the grove.
1935	Utah Tree fell April 7th.
1943	Mark Twain Tree fell.