Colorado Lagoon Park

Natural Features

Found in the Alamitos Heights neighborhood of Long Beach, California, Colorado Lagoon Park spans a refreshing 29 acres of urban oasis. At its heart lies an 18-acre saltwater tidal lagoon - one of the West Coast's few remaining coastal salt marshes in an urban setting.

The lagoon connects to Alamitos Bay and eventually the Pacific Ocean through a culvert. This tidal exchange creates a thriving little ecosystem where, if you're patient, you might spot fish darting through the water, stingrays gliding along the bottom, or even the occasional jellyfish pulsing by.

Historical Background

This wasn't always the tranquil spot we see today. Once part of the expansive Los Cerritos Wetlands complex, Colorado Lagoon underwent a significant transformation when it was dredged in 1923, creating both the lagoon and nearby Marine Stadium.

The lagoon had its moment of fame when it hosted the 1932 U.S. Olympic Diving Trials - quite the prestigious event for a neighborhood waterway! Since then, it's settled into its role as a cherished gathering place for generations of Long Beach residents seeking a slice of nature within the city limits.

Restoration Efforts

Like many urban natural spaces, the lagoon has weathered its share of environmental challenges. Years of development and pollution took their toll on water quality and wildlife. Thankfully, the tide has turned.

Extensive restoration work has significantly improved the ecosystem. Projects have included removing contaminated sediment, improving water circulation, and reestablishing native habitats. The Western Arm of the lagoon has been thoughtfully transformed into a natural area showcasing native plant communities - from coastal sage scrub to salt marsh habitats.

You should know that improvement projects are ongoing to enhance the lagoon's connection to open water, which means some areas might be temporarily off-limits during construction.

Sunset casts golden light across Colorado Lagoon

Photo: Roger Howard (CC0 1.0)

Wildlife and Ecology

Despite its urban setting, this park is a vital ecological haven. The restored habitats support 17 native salt marsh plant species and attract over 75 species of marine birds - including the endangered California least tern if you're lucky enough to spot one.

Below the water's surface, various fish species and marine invertebrates have made themselves at home. For bird enthusiasts, this is a particularly rewarding spot - ducks paddle leisurely across the water, pelicans swoop down for a catch, and elegant cranes stalk the shallows with impressive patience.

Visitor Amenities

The park strikes a thoughtful balance between recreation and conservation. Sandy beaches invite swimmers (with lifeguards keeping watch during busy seasons), while picnic areas with tables offer perfect lunch spots. Walking trails winding around the perimeter provide a gentle escape from urban hustle.

Families appreciate the covered playground where kids can play on modern equipment without overheating in the California sun. The playground's strategic location near the sandy beach makes it easy to switch between activities. Clean, well-maintained public restrooms round out the practical amenities.

Recreation Options

Summer brings swimmers to the lagoon's calm, wave-free waters - especially families with young children who appreciate the gentler swimming environment. A small bridge spans the lagoon, offering not just a crossing but a favorite spot to lean over the railing and search for marine life in the waters below.

The grassy areas surrounding the water create natural picnic spots, with several tables available for those who prefer not to spread a blanket. While you'll need to leave the barbecue at home (not permitted here), the park remains a favorite for family gatherings and quiet afternoon retreats.

Walking paths circle the lagoon, offering a peaceful nature stroll without leaving the city. What makes Colorado Lagoon special is this very blend - playground fun, beach relaxation, and nature appreciation all in one accessible location.