A place like no other near Newport Beach in California
The Upper Newport Bay Nature Preserve spans approximately 1,000 acres of coastal wetland in Southern California, making it one of the largest remaining estuarine ecosystems in the region. This remarkable natural sanctuary sits at the mouth of San Diego Creek, where fresh water meets the salt water of the Pacific Ocean, creating a rich and productive habitat that supports an extraordinary diversity of plant and animal life. Designated as a California State Ecological Reserve, the preserve provides critical stopover habitat for migratory birds traveling along the Pacific Flyway, one of North America’s primary bird migration corridors. The bay is managed cooperatively by the California Department of Fish and Wildlife and the Orange County Parks system, reflecting its importance as both a conservation area and a public recreation destination.
Visitors to the preserve can explore more than 10 miles of hiking and biking trails that wind through scenic bluffs, marshes, and coastal sage scrub landscapes. The Back Bay Loop Trail, a well-maintained 10.5-mile loop, circles the entire bay and offers sweeping views of the wetlands, the San Joaquin Hills, and the distant Santa Ana Mountains. Birdwatchers will find the preserve exceptional, with more than 200 bird species recorded here, including the endangered California least tern, the light-footed Ridgway’s rail, and seasonal visitors such as American white pelicans and great blue herons. The Peter and Mary Muth Interpretive Center, located at the northern end of the bay, provides interactive exhibits and knowledgeable staff who lead guided tours about the bay’s ecology, geology, and cultural history.
Outdoor enthusiasts can launch kayaks and stand-up paddleboards from the Newport Dunes Waterfront Resort to explore the calm backwaters of the bay at water level, drifting past salt marsh vegetation and observing wading birds up close. Anglers cast for spotted bay bass, halibut, and croaker from designated shoreline spots, while trail runners and cyclists enjoy the moderately challenging terrain of the bluff-top paths. The preserve’s distinct seasonal rhythms bring spring wildflower displays, fall migrations, and year-round opportunities for nature photography and quiet contemplation. Unlike the bustling beaches of the Balboa Peninsula, the Upper Newport Bay Nature Preserve offers a peaceful retreat where visitors can experience Southern California’s wild coastal heritage just minutes from the urban centers of Orange County.
The preserve is open daily from 7:00 a.m. to sunset with no admission fee, and parking is available at the Muth Interpretive Center lot on University Drive as well as designated trailheads along Back Bay Drive. The interpretive center is open Tuesday through Sunday from 10:00 a.m. to 4:00 p.m. and offers community programs, Junior Ranger activities, and habitat restoration volunteer opportunities throughout the year. Early morning and late afternoon visits provide the best wildlife viewing and most comfortable temperatures during the warmer months. The preserve stands as a testament to successful conservation efforts in one of California’s most densely populated regions, welcoming birders, families, students, and anyone seeking a connection to the natural world within the heart of the Newport Beach community.