Alum Rock is a neighborhood and census-designated area of East San Jose, California. Alum Rock is a suburb of San Jose with a population of 11,791 and was originally its own town. Living in Alum Rock offers residents a rural feel and most residents own their homes. In Alum Rock there are a lot of coffee shops and parks. The public schools in Alum Rock are above average. It is home to Alum Rock Park, the oldest municipal park in California and one of the largest in the United States.

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Alum Rock November 27, 2021
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Alum Rock is a neighborhood in San Jose, California with a population of 63,434. Alum Rock is in Santa Clara County. Living in Alum Rock offers residents a dense suburban feel and most residents own their homes. In Alum Rock there are a lot of parks. Many families and young professionals live in Alum Rock and residents tend to be liberal. The public schools in Alum Rock are above average.


Middle School

High School

Elementary School


Penitencia Creek

Upper Penitencia Creek is actually one of two creeks by the name Penitencia Creek in the northeastern Santa Clara Valley of Santa Clara County, California. They are both tributaries of Coyote Creek. The upper creek was diverted southwestward, connecting it directly to Coyote Creek ca. 1850 by a farmer to irrigate his fields, permanently splitting Upper Penitencia Creek from Lower Penitencia Creek.[5] Upper Penitencia Creek drains the western slopes of Mount Hamilton of the Diablo Range, and passes through Alum Rock Park, before ending at its confluence with Coyote Creek at Berryessa Road.

Lower Penitencia Creek flows along the historic Mission Road between Mission Santa Clara and Mission San Jose. It runs through the city of Milpitas before receiving flows from Berryessa Creek, Piedmont Creek, Arroyo de Los Coches, Tularcitos Creek, and Calera Creek before entering Coyote Creek near Dixon Landing Road at the southern end of San Francisco Bay.

Alum Rock Park

Alum Rock Park, in the Alum Rock district of San JoseCalifornia, is California's oldest municipal park, established in 1872 but serving as public land since the pueblo was established in 1777. Located in a valley in the Diablo Range foothills on the east side of San Jose, the 720 acres (2.9 km2) park offers 13 miles (21 km) of trails, varying from fairly level along Penitencia Creek to sharp switchbacks climbing to the ridges to the South Rim Trail and the North Rim Trail. The narrow floor of the valley includes a visitor center, a small museum/animal rehab facility, picnic areas, playgrounds, lawns, sand volleyball pits, mineral springs, lush plant life, woodlands, creek play opportunities, and occasional group camping.

The ridge trails offer views of Santa Clara Valley and of the valley in which the park is located. Some trails in the park are a part of the Bay Area Ridge Trail; the Todd Quick trail connects with the Santa Clara Valley Open Space Authority's 1,600-acre Sierra Vista Open Space Preserve.

Equestrians and mountain bikers have access to some of the park's trails, while others are reserved for hikers only. Cross-country teams from high schools around North San Jose, such as James Lick High School and Independence High, use the park for training and for meets.