Established in 1876, Martinez is the County seat of Contra Costa County. It is located along the Sacramento and San Joaquin rivers in the central part of the County. The City's roots can be traced to the late 1840's, when it served as a ferryboat transit point across the Carquinez straits on the way to the gold fields. Today, the City covers 12.5 square miles, 16 City parks, a Marina and has approximately 36,700 residents. As one of California's first towns, Martinez retains a strong sense of history and family. The renowned naturalist John Muir made Martinez his home for nearly a quarter of a century and in 1915, the year after Muir's passing, the legendary baseball great Joe DiMaggio was born here. One of the unique aspects of Martinez is its architecture. Many of the downtown shops still retain their early 20th Century look and charm, with some homes dating back more than 125 years.Martinez has modernized both its infrastructure and its downtown. The City opened an award-winning Intermodal Facility in 2001 that has become a popular stop along the Amtrak line. It also completed a major restoration of Alhambra Creek that beautifies the downtown and controls flooding, and has embarked on a program to make Martinez a cultural-historical attraction as the home of the John Muir Festival Center. An outdoor amphitheater is the first realization of this long-term program.