Mount Hamilton is a mountain in California's Diablo Range, in Santa Clara County, California. Mount Hamilton, at 4,265 feet is a mountain overlooking Santa Clara Valley and is the site of Lick Observatory, the World's first permanently occupied mountain-topobservatory. The asteroid 452 Hamiltonia, discovered in 1899, is named after the mountain. Golden eagle nesting sites are found on the slopes of Mount Hamilton. On clear days, Mount Tamalpais, the Santa Cruz Mountains, Monterey Bay, the Monterey Peninsula, and even Yosemite National Park are visible from the summit of the mountain.