The park was once home to the New Almaden Quicksilver Mines, which were the most productive mercury mines in North America.
During the mid-19th century, the site was crucial to the California Gold Rush, providing mercury used to process gold ore.
The park contains remnants of an entire company town, including sites where miners from diverse backgrounds like Cornwall, Chile, and Mexico lived.
It is designated as a National Historic Landmark District for its industrial archaeological significance.
Wildlife in the park includes mountain lions, bobcats, mule deer, and coyotes.
The park's name, 'Quicksilver', is an archaic term for liquid mercury.
Some trails are built on former narrow-gauge mining railroad beds, resulting in gentle grades in otherwise steep terrain.
Almaden Quicksilver County Park encompasses 4,163 acres of rugged terrain formerly used for mercury mining. The park features over 30 miles of trails traversing oak woodlands, chaparral, and grasslands. Mining remnants, including foundations and rusted equipment, remain visible along specific trails. Elevations range from 400 to 1,700 feet, providing significant elevation gain for hikers and equestrians. The park is managed by Santa Clara County and maintains a status as a protected historical and recreational site. Several trailheads provide access to the interior, with some areas restricted for habitat preservation.
The Mockingbird Hill trailhead overlook for panoramic views of the Almaden Valley.
Bring significantly more water than you expect to drink, as most of the trails are fully exposed to the sun.
Use the Hiker-Only trails if you want to avoid mountain bikers and equestrians.
Download an offline map before arriving, as cellular service is intermittent or non-existent in the canyons.
Hiking during the middle of the day in summer due to extreme heat and lack of shade.
Park gates typically open at sunrise and close at sunset daily.
Stay on marked trails to protect sensitive mining ruins and avoid poison oak; clean up after horses and dogs.
