Imperial Valley

Proposed National ParkCalifornia
The crusted shoreline of the Salton Sea at sunset, with mountains across the water
All proposed National ParksImperial Valley (Salton Sea / Anza-Borrego)No active campaign
Location
California
Current protection
Salton Sea, Sonny Bono Salton Sea National Wildlife Refuge, Anza-Borrego Desert State Park
Status
No active campaign; monument under federal review
In the book
Featured in Undiscovered America

Why should it be a National Park?

The Imperial Valley in southern California was once an extremely popular travel destination known as the home of the Salton Sea. This accidental lake is now a virtually abandoned expanse of saltwater surrounded by building ruins, odd geologic formations, and thermal hotspots that pop up infrequently along its shore.

In 1905, a naturally formed lakebed was flooded with additional waters from the Colorado River. Initially, this lake was welcomed by people across the southwest as a vacation paradise. This desert oasis lasted a few decades, but evaporation caused the water level to drop and the salt content to skyrocket. This sudden environmental change killed millions of fish, leaving a wasteland of death on the former beaches. Clouds of dust now regularly emanate from the dying lake bed, often causing a white, smoky atmosphere. Prolonged exposure to this dust has been linked to lung cancer and asthma, causing the local's life expectancy to be the lowest in the nation.

Immediately bordering the Salton Sea is the Sonny Bono Salton Sea National Wildlife Refuge. The primary attractions around the refuge are birdwatching and wetlands, as well as thermal features called mud pots and mud volcanoes. "No trespassing" signs are located near the site suggesting visitors stay away, but very few people who visit the site listen. It is very dangerous to walk within 15 feet of the thermal features, as the ground can give way under your feet to 700-degree mud. This area, which could be a miniature Yellowstone, needs better infrastructure to make it a safe destination.

In addition to the man-made Salton Sea, the Imperial Valley has many other amazing and substantial natural sites. The Anza-Borrego Desert State Park to the west is a badlands environment that covers 600,000 acres, making it the largest state park in California and second largest in the contiguous United States. The park offers beautiful sweeping vistas sometimes with breathtaking wildflower blooms that appear after rainfall. This desert is home to an immense amount of wildlife and vegetation. Roadrunners, eagles, mules, deer, bighorn sheep, rattlesnakes, and a variety of lizards and iguanas all call the park their home. Another feature at the south end of the Imperial Valley is the excellent Imperial Dunes. These are the largest expanse of sand dunes in California, running 40 miles across the bottom of the state.

While this area has been in decline for decades and it's also not what most people would think of as an exemplary natural landscape, within this devastation lies opportunity. The Salton Sea has scientific, historic, and scenic importance. If a government agency were to step in and reconsider the region as an area to be interpreted and reclaimed, this could result in the first federal park formed specifically with the intention of restoration. A park formed not for its undisturbed natural grandeur, but as an example of how we can take an altered landscape, restore it, and foster its return to health.

The history of National Park Campaigns

The desert's great park moment was the 1928 Olmsted state park survey's "Borrego Palms Desert Park" — a 120,000-acre core with a 184,000-acre extension to the Salton Sea — cut down by San Diego County supervisors to what became Anza-Borrego Desert State Park (first parcel 1932). The Salton Sea was refuge-protected (1930), the dunes wilderness-protected (1994), and the mountains east of the sea became Chuckwalla National Monument (January 2025). No federal National Park was ever proposed.

Eroded badlands running to distant mountains above the Anza-Borrego desert floor
Distinct National Park attempts
0 federal (1 large state-park vision, 1928)
Other designation attempts
refuge 1930; state park 1932–33; SRA 1955; wilderness 1994; monument 2025

Sources

  • Olmsted, Report of State Park Survey of California (1929)
  • San Diego History Center, Anza-Borrego histories
  • P.L. 105-372
  • Chuckwalla proclamation (2025)
  1. 1928

    Olmsted Jr. survey; Guy Fleming's "Borrego Palms Desert Park" proposal (120,000 + 184,000 acres; boosters spoke of a million).

  2. 1932–33

    County opposition ("desert waste"); first parcel November 17, 1932; Anza-Borrego Desert State Park.

  3. 1930

    Salton Sea National Wildlife Refuge (renamed Sonny Bono NWR, 1998).

  4. 1955/1963

    Salton Sea State Recreation Area.

  5. 1976

    FLPMA §601 California Desert Conservation Area; 1980 Desert Plan; 1994 — North Algodones Dunes Wilderness (CDPA).

  6. 1998

    Sonny Bono Memorial Salton Sea Reclamation Act (P.L. 105-372; S. 1716 Boxer / H.R. 3267 Hunter).

  7. January 2025

    Chuckwalla National Monument (Mecca Hills–Chuckwalla Mountains); status under 2025–26 review.