Alum Rock Park Adventures

Alum Rock Park, located in the foothills of the Diablo Range just east of downtown San Jose, California, spans over 720 acres of varied terrain including steep canyons, chaparral, and riparian habitats. The park is one of California's oldest municipal parks, established in 1872, and features natural mineral springs that originally attracted visitors seeking rejuvenation. Its geography is marked by rocky outcrops and trails that wind along Penitencia Creek through oak woodlands and grasslands, providing refuge for a diverse range of wildlife including mule deer, bobcats, and over 130 bird species. The historic park also contains old stone buildings and picnic areas, preserving its 19th-century use as a resort. Today, Alum Rock Park is a favorite destination for outdoor recreation with nearly 13 miles of hiking trails that vary in difficulty, scenic overlooks offering views of Silicon Valley, and seasonal creek activity. Visitors enjoy hiking, trail running, mountain biking, and photography. The park’s accessibility within an urban setting makes it a valued green space for families, nature lovers, and fitness enthusiasts. Additionally, Alum Rock Park contributes to local conservation by protecting native ecosystems and providing educational programs to promote environmental stewardship.