Bernal Subbasin

Tulare Lake was a large, shallow lake in eastern Amador Valley, surrounded by Willow Marsh (also known as the Lagoon). Tule rushes and willow trees once lined the marshes and sloughs of its shores. Drainage alterations starting in the 19th century have since reduced the marsh to the Arroyo de la Laguna, and the city of Pleasanton has since expanded across what was once marshland. Such rapid developments have led to tricky seasonal flow variations in Niles Canyon.The lake was fed by Arroyos Mocho, Valle, and Las Positas (when rainfall was substantial enough for them to reach the lagoon), as well as by Tassajara Creek and other Amador Valley creeks. Its seasonal outlet was the Arroyo de la Laguna. Tulare Lake was densely inhabited by groups of the Ohlone people prior to the 19th century.

Arroyo Valle or Arroyo Del Valle is a 36.4-mile-long (58.6 km) westward-flowing stream that begins in northeastern Santa Clara County, California, and flows northwesterly into Alameda County where it is dammed to form Lake Del Valle. After that Arroyo Valle is a tributary to Arroyo de la Laguna which in turn flows into Alameda Creek and thence to San Francisco Bay. In the past, the Arroyo Valle had a significant steelhead migration; however, degradation of the stream in the latter half of the 20th century has decimated this anadromous fish population.

The Alameda County Fairgrounds is a 270-acre (110 ha) facility located in Pleasanton, California. It is home to the annual Alameda County Fair, held since 1912, as well as numerous trade shows and community events. Located on its grounds, the Pleasanton Fairgrounds Racetrack was built in 1858, making it the oldest one-mile (1.6 km) horse racing track in the United States. There is a 3,000 seat amphitheater, as well as a 9-hole golf course located within the track's infield. The Alameda County Central Railroad Society has maintained a model train exhibit at the fairgrounds since 1959, which has grown to two 15-by-100-foot (4.6 by 30.5 m) layouts in O scale and HO scale.Building J, also known as the Amador Pavilion, is a multi-purpose arena and livestock event facility at the fairgrounds. It was briefly home to the Tri-Valley Ranchers of the National Indoor Football League. Fair cancellations happened in 1917–1918, 1942–1944 and 2020.

The Alviso Adobe Community Park is a 7-acre (2.8 ha) park in the city of Pleasanton, California, United States. It is built around an adobe house constructed in 1854 by Francisco Alviso on the Rancho Santa Rita Mexican Land Grant. The Alviso Adobe is a rare surviving example of an early American adobe that was continuously in use until 1969. The building is registered as California Historical Landmark #510 in 1954, but most of the historical marker was later found to be erroneous.Construction of the park was initially planned to begin in 2000, but the city could not secure funding until 2007, when the $4.4 million project was finally begun. The park opened to the public with a grand-opening ceremony on October 25, 2008. Besides the adobe, which is furnished as it would have been in the 1920s, the park contains a replica of an old dairy and interpretive displays of Ohlone culture.

South San Ramon Creek is a 9.3-mile-long (15.0 km) southward-flowing stream in Alameda County and southern Contra Costa County, in the East Bay region of northern California. The creek is a tributary to Arroyo de la Laguna, flowing in the western Livermore Valley through Dublin and Pleasanton.

Arroyo Mocho is a 34.7-mile-long (55.8 km) stream which originates in the far northeastern corner of Santa Clara County and flows northwesterly into eastern Alameda County, California. After traversing the cities of Livermore and Pleasanton it joins South San Ramon Creek to become Arroyo de la Laguna, which in turn flows to Alameda Creek and thence to San Francisco Bay.

Pleasanton station is a train station in Pleasanton, California served by Altamont Corridor Express (ACE) trains. It is located northwest of downtown Pleasanton adjacent to the Alameda County Fairgrounds. The station has a single side platform on the single track of the Union Pacific Railroad Oakland Subdivision.

The Pleasanton Public Library serves the city of Pleasanton in Alameda County, California. The library is located near downtown Pleasanton at 400 Old Bernal Avenue. The Pleasanton Women's Improvement Club was formed in 1908 to improve the community of Pleasanton, an agricultural town located in the "Tri-Valley" area east of San Francisco. Their first project was to establish a reading room. With $1,100 they raised at an "Old Maid's Convention" and other fundraisers, they purchased a site to house the Reading Room. In 1909, it was opened to the public. Books were donated and a librarian was hired for $10 per month. Honored guests for the formal opening were Mrs. Phoebe Apperson Hearst and her guest, the Consul of Persia. After Pleasanton's first city hall (now the Museum on Main Street) was built in 1915, the city leased a portion of it to the club for $1 per year to house the library and reading room.The library has grown to keep pace with Pleasanton as it changed from an agricultural town to a suburban residential community and one of the modern business centers of the East Bay area. In 1964, the library became a full member of the Alameda County Library system. In 1973, the need for growth led the library to a new 6,900-square-foot (640 m2) facility on Black Avenue, with approximately 35,000 books. In 1987, the city recognized the need for an even larger library and began construction on the current 30,000-square-foot (2,800 m2) facility, which opened in 1988. In 1999, in response to significant funding losses to the Alameda County Library system generated by California's "Educational Revenue Augmentation Fund", the City of Pleasanton withdrew from the system to become a municipal library. Since that time, use of the library has more than doubled, with more than 1.1 million items checked out in calendar year 2005.

The Alameda County Fire Department (ACFD) provides all-risk emergency services to the unincorporated areas of Alameda County, California (excluding Fairview), the cities of San Leandro, Dublin, Newark, Union City and Emeryville, the Lawrence Berkeley National Laboratory and the Lawrence Livermore National Laboratory. With 28 fire stations and 35 companies serving a population of 394,000, the ACFD serves densely populated urban areas, waterways, industrialized centers, extensive urban interface, agricultural and wildland regions. Over 400 personnel and 100 reserve firefighters provide a wide variety of services to a community roughly 508 square miles (1,320 km2) in size. These services include: Advanced Life Support Emergency Medical Services Response Fire Suppression Response Hazardous Materials Response Urban Search & Rescue Response Water Rescue Response Community Outreach & Education efforts Disaster Preparedness Fire Prevention and Code Compliance efforts Regional Dispatch

Alameda County ( AL-ə-MEE-də) is a county located in the U.S. state of California. As of the 2020 census, the population was 1,682,353, making it the 7th-most populous county in the state and 21st most populous nationally. The county seat is Oakland. Alameda County is in the San Francisco Bay Area, occupying much of the East Bay region. The Spanish word alameda means either "a grove of poplars...or a tree lined street". The name was originally used to describe the Arroyo de la Alameda. The willow and sycamore trees along the banks of the river reminded the early Spanish explorers of a road lined with trees. Although a strict translation to English might be "Poplar Grove Creek", the name of the principal stream that flows through the county is now simply "Alameda Creek". Alameda County is part of the San Francisco–Oakland–Berkeley, CA Metropolitan Statistical Area, and the San Jose–San Francisco–Oakland, CA Combined Statistical Area.

The Human Relations Commission is the governmental organization appointed by the Alameda County Board of Supervisors in the United States to advise them on community issues including education, employment, and public safety. The commission has power to conduct studies on current intergroup conditions, provide recommendations for volatile situations, and propose long-term solutions to promote acceptance of diversity.The Human Relations Commission is a body appointed by the Alameda County Board of Supervisors to advise them on community issues such as education, employment, and public safety. The commission has the power to conduct studies on current intergroup conditions, provide recommendations for volatile situations, and propose long-term solutions to promote acceptance of diversity. The commission consists of up to sixteen commissioners, three members appointed by each County Supervisor and one member appointed by the Mayors' Conference. Commissioners serve a three-year appointment. Positions are currently available. The Human Relations Commission is located with the Alameda County Social Services Agency.

Foothill High School (FHS) is a public high school in Pleasanton, California, United States. It was established in 1973 and is part of the Pleasanton Unified School District. It is a fully accredited WASC school, with its six-year WASC accreditation approved in the 2018–2019 school year. It was recognized as a California Distinguished School in 1994, 2001, 2005 and 2019. It was a 2002 nominee, and a 2006 winner of the National Blue Ribbon Award. In the US News school rankings for 2020, it was ranked #415 in the National Rankings and #52 in the California High School rankings.