Overview
The Sonny Bono Salton Sea National Wildlife Refuge sits at the southern end of the Salton Sea in Imperial County, California. It was established to protect habitat along one of North America's most important migratory corridors, the Pacific Flyway, and is managed by the U.S. Fish and Wildlife Service. The refuge was renamed in 1998 to honor the late congressman and entertainer Sonny Bono, who was a vocal advocate for restoring the Salton Sea.
The Salton Sea itself is California's largest inland body of water, formed accidentally in the early 1900s when irrigation canals from the Colorado River breached. The refuge encompasses freshwater impoundments, mudflats, desert scrub, and agricultural areas adjacent to the sea's southern shoreline. These varied habitats support more than 400 recorded bird species, making it one of the most species-rich birding sites in the United States.
The surrounding landscape is quintessential Sonoran Desert — flat, arid, and expansive — with the chocolate-brown Santa Rosa and Orocopia Mountains visible to the north. Summer temperatures routinely exceed 110°F (43°C), which shapes the refuge's character almost as much as the water does. This is a working natural area, not a manicured park, and conditions — including water levels, odors from the sea, and road accessibility — can vary considerably by season and year.
Before You Go
Climate and Seasons
Winter (November through February) is the prime season. Temperatures are mild (daytime highs in the 60s–70s°F / roughly 15–25°C), and the refuge hosts its largest concentrations of waterfowl, shorebirds, raptors, and occasionally rare species blown off course during migration. Spring migration (March–May) brings another wave of activity. Summer is extremely hot and is not recommended for most visitors; some sections of the refuge may close or have reduced hours during the hottest months.
What to Pack
- Binoculars and a spotting scope — essential for serious birding
- Layered clothing; mornings can be cool even in winter
- Sunscreen, hat, and plenty of water year-round
- Insect repellent, particularly in warmer months near the impoundments
- A field guide to western birds (apps such as Merlin Bird ID are widely used here)
Health Note
The Salton Sea has elevated salinity and can emit hydrogen sulfide odors, particularly in summer. Some visitors find the smell noticeable. Those with respiratory sensitivities should take this into account. Verify current conditions with the refuge before visiting.
Entry and Fees
The refuge is managed by the U.S. Fish and Wildlife Service. Verify current admission policies, hours, and any seasonal closures directly at the official refuge page on fws.gov before your visit, as these can change.
Getting There
By Car
The refuge headquarters and visitor center are located on Sinclair Road near the town of Calipatria, in Imperial County. The nearest sizable cities are El Centro (approximately 20–25 miles south) and Brawley (roughly 15 miles south). From the Los Angeles area, the drive is approximately 2.5–3 hours via Interstate 10 east to Highway 111 south. From San Diego, the typical route runs east on Interstate 8 to Highway 86 or Highway 111 north.
Nearest Airports
El Centro Regional Airport (IPL) is the closest commercial airport but has very limited scheduled service. Palm Springs International Airport (PSP) and San Diego International Airport (SAN) are the most practical options for fly-drive visitors. Car rental is essentially mandatory; there is no public transit to the refuge.
By Bus or Public Transit
There is no public transit service to the refuge itself. Imperial Valley Transit operates routes in the broader Imperial County area, but the refuge is not served. A personal vehicle or rental car is required.
Getting Around
The refuge is best explored by car along its gravel and dirt access roads, with periodic stopping points for observation. A short walking trail near the visitor center allows foot access to viewing areas over the impoundments. Parts of the refuge require high-clearance vehicles, particularly after rain; verify road conditions locally before venturing onto unpaved sections.
Biking is permitted on designated roads. The flat terrain is manageable, but heat and distance between points of interest mean it is only practical in cooler months. Guided tours are occasionally offered by refuge staff or local birding organizations — check the refuge's official communications for scheduled programs.
Things to See & Do
Wildlife Viewing and Birding
Birding is the primary draw. The refuge regularly records large flocks of Snow Geese, Ross's Geese, and numerous duck species in winter. Shorebirds including Dunlin, Long-billed Dowitchers, and various sandpipers use the mudflats. Yuma Clapper Rail (now recognized as Ridgway's Rail) nests in the marsh vegetation. White and Brown Pelicans, Great Blue Herons, and a variety of egrets are year-round residents. Rare and vagrant species turn up with enough regularity that the refuge attracts birders from across the country.
Photography
The combination of birds, reflective water, and desert light — particularly at sunrise and golden hour — makes the refuge a compelling destination for wildlife photographers. A telephoto lens is strongly recommended.
Nature Walks
The short trail near the visitor center is accessible to most visitors and offers elevated views over the freshwater impoundments. Wear sturdy footwear; the ground can be uneven and muddy near water edges.
Surrounding Area Exploration
Many visitors pair the refuge with a stop at the Salton Sea State Recreation Area to the north, the nearby Wister Unit of the Imperial Wildlife Area, or a drive along Highway 111 to observe the broader Salton Sea shoreline and the unusual communities that developed along its banks.
Food & Drink
There are no food or beverage facilities at the refuge itself. The nearest services are in Calipatria, Brawley, or El Centro, each offering a range of fast food, diners, and supermarkets typical of rural California towns. Plan to bring your own water and snacks — adequate hydration is genuinely important given the desert heat for most of the year. El Centro has the widest variety of dining options in the immediate region.
Practical Information
Visitor Center
The refuge maintains a visitor center near the Sinclair Road entrance. Hours vary seasonally and may be limited or closed on certain days. Verify current hours on the official U.S. Fish and Wildlife Service website (fws.gov) before visiting.
Cell Service
Cell coverage is inconsistent in parts of Imperial County and near the refuge. Download offline maps and bird identification apps before you arrive.
Restrooms
Basic restroom facilities are typically available near the visitor center. There are no facilities on more remote sections of the refuge.
Emergency Services
In an emergency, call 911. The nearest hospitals are in El Centro. Given the remote desert setting, inform someone of your plans before heading out, particularly in summer.
Safety
Heat is the most serious hazard. Summer temperatures can be life-threatening and are not suitable for casual outdoor activity. Even in mild seasons, temperatures rise quickly after mid-morning. Always carry more water than you think you need — at least one liter per person per hour during active walking in warm conditions.
Be aware of rattlesnakes, particularly near water and rocky areas in warmer months. Watch where you step and place your hands. The Salton Sea's shoreline in some areas has unstable or crusted salt flats that can be difficult to walk on and may conceal soft mud. Stick to designated paths and roads unless you are familiar with the terrain.
Do not approach or handle wildlife. Nesting areas may be closed seasonally to protect sensitive species — respect all posted closures.
