Colorado Lagoon Park

Colorado Lagoon is a 29-acre public park located in the Alamitos Heights neighborhood of Long Beach, California. The park's centerpiece is an 18-acre saltwater tidal lagoon, which is one of the few remaining coastal salt marshes on the West Coast. The lagoon is connected to Alamitos Bay and the Pacific Ocean through a culvert, allowing for tidal exchange and supporting a diverse ecosystem.

Originally part of the larger Los Cerritos Wetlands complex, Colorado Lagoon has undergone significant changes since the late 19th century. In 1923, the area was dredged to create the lagoon and Marine Stadium. The lagoon gained prominence when it hosted the 1932 U.S. Olympic Diving Trials, becoming a popular recreational spot for swimming and other water activities.

Over the years, urban development and pollution negatively impacted the lagoon's water quality and ecosystem. However, extensive restoration efforts have been undertaken to improve the site. Recent projects have included dredging contaminated sediment, improving tidal circulation, and restoring native habitats. The Western Arm of the lagoon has been transformed into a natural area, featuring native plant communities such as coastal sage scrub, coastal strand, and salt marsh habitats.

The park provides important ecological functions, serving as a refuge for various wildlife species. It hosts 17 native salt marsh plant species and over 75 species of marine birds, including the endangered California least tern. The lagoon's waters are home to multiple fish species and marine invertebrates, making it a valuable urban ecosystem.

Colorado Lagoon offers recreational opportunities for visitors while balancing conservation efforts. The park includes sandy beaches for swimming, picnic areas, and walking trails. Educational programs and nature walks are often conducted to engage the public in environmental awareness and stewardship of this unique urban wetland.