Antioch, California
A regional park surrounding an 80-acre reservoir, popular for swimming and fishing.
Swim lagoon; reservoir fishing; hiking trails.
Swim in the lagoon (summer); fish for catfish and trout; hike.
Year-round; swimming in summer.
Parking fee; swim fee.
Lifeguards (seasonal); picnic areas; restrooms.
A great place for a family picnic and swim.
Black Diamond Mines Regional Preserve; Antioch.