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The Amador-Livermore Valley was first sighted by a Spanish soldier, Captain Pedro Fages, in 1772 while on an expedition searching for new mission sites. It was a half-century after this discovery that Jose Amador, in 1826, brought the first settlement to the valley, which still bears his name. Spanish families were awarded huge tracts of land as a result of the abandonment of the California Mission System.

John W. Kottinger, who arrived in 1851, was responsible for the naming of Pleasanton after a distinguished Civil War general, Alfred Pleasonton. However, a spelling error by a recording clerk in Washington D.C. resulted in a much more appropriate name. When the transcontinental railroads rolled into Pleasanton in 1869, the town was assured of a future. The population then was only 500, but it soon began to grow.

Ranchers and thoroughbred horse breeders were attracted to the favorable climate and abundance of water, and were soon followed by dairy farms, hop fields and vineyards. Blessed with rich soil, Pleasanton soon became the agricultural center for the Amador Valley and home to the oldest horseracing track in the nation. The hops grown here were sought by many of the largest beer producers in the United States and Europe, making Pleasanton internationally famous.

Pleasanton was incorporated in 1894 and by 1900 was a thriving community complete with the Bank of Pleasanton, the Pleasanton Hop Company, the Ruby Hill vineyard, and three fancy hotels. Main Street became a center for business and community activity and, although agriculture didn’t completely disappear, Pleasanton was on the road to becoming a modern community.

By 1930, enterprising men such as Henry J. Kaiser determined the great potential of sand and gravel below the Valley’s surface. The gravel industry has been one of the Valley’s most enduring and profitable industries throughout the last half-century. The 1960′s and 1970′s were decades of rapid population growth in the city, and by 1979, much of the land in Pleasanton was supporting homes, schools, and businesses, instead of tomatoes, cucumbers and grapes.

It was 1982 that brought one of the most dramatic turning points in the city’s history. That year, ground was broken on the first building in the 850-acre Hacienda Business Park. The park was built on swampland that had previously been considered as a site for a large mobile home park. Instead, Pleasanton became home to corporate giants and the face of the city was forever changed.

In 1994 Pleasanton celebrated its 100th anniversary as a city.  Today Pleasanton is a thriving city with excellent schools, a strong economic base and well-planned neighborhoods.