The park's reservoir was the first water supply for the city of Oakland.
The masonry dam at the site is a registered California Historical Landmark.
The park was once the location of an early-20th-century amusement park called Idora Park, though the structures were demolished after a fire.
The water in the reservoir is chlorinated only in the designated swim area during the summer season.
The park is home to a diverse array of bird species, including great blue herons and double-crested cormorants.
Temescal Regional Recreation Area is a historic park centered around a 12-acre reservoir originally constructed in 1868 to provide water to Oakland. The park features a designated swimming beach with seasonal lifeguard supervision. Trails for hiking and jogging encircle the lake, connecting to the broader East Bay Regional Park District network. Visitors can utilize designated picnic areas equipped with barbecue pits and tables. The reservoir is stocked with fish including trout, black bass, and bluegill. It serves as a significant urban green space nestled within a steep-walled canyon in the Oakland Hills. The park includes a dedicated off-leash dog area located near the park entrance. Recreational boating is limited to human-powered craft like kayaks and canoes, subject to park regulations.
The north end of the lake looking south toward the dam with the Oakland Hills in the background.
Check the park's official water quality alerts online before planning a swim, as blue-green algae can occasionally cause seasonal closures.
Arrive early on warm weekends as the parking lot fills to capacity quickly.
Bring your own shade gear if planning a long picnic, as many tables are in open areas.
Do not attempt to swim in the reservoir outside of the designated, roped-off beach area, as water conditions are not monitored elsewhere.
Lifeguard services and designated swimming are limited to the summer season; check for seasonal water quality notices.
Leash dogs in all areas except the designated off-leash dog park; pack out all trash to keep the reservoir clean.
