on the de Anza Expedition to found the Presidio of San Francisco in March, 1776 wrote in his diary, "we saw a grove of live oaks near which is the Laguna de la Merced, where Captain Ribera stopped; and here we saw many bears (California Grizzly Bear)..."

At approximately 11pm of November 22, 1852, a shock was reported to have occurred by those in the areas around the Lake and the following day reports were