In 2017, billionaire couple gave $165 million to save 24,000 acres of California coastline. It was the biggest donation in the history of Nature Conservancy

In a state where some of the most valuable land is constantly under pressure from development, a 24,364-acre stretch of California coastline remains remarkably free of subdivisions, highways and resorts — thanks in part to a $165 million donation from two technology billionaires.

In December 2017, Esri founders Jack and Laura Dangermond donated $165 million to The Nature Conservancy to help conserve the land around Point Conception in Santa Barbara County. The donation was said to be the biggest in the history of The Nature Conservancy at that time. The property, formerly known as the Cojo-Jalama Ranch, became the Dangermond Preserve.

The donation was aimed at permanently protecting one of California's ecologically and culturally significant coastal landscapes.

Where two ocean ecosystems meet

Point Conception is not just another scenic section of the California coast.

The coastline changes direction at the point, bending from a north-south orientation toward an east-west one. That geographic feature also marks a major transition between two marine ecosystems.

Cold-temperate and subtropical marine species meet in the waters around Point Conception, making the area an important boundary between distinct ecological communities.

A 2023 peer-reviewed study published in PLOS ONE identified Point Conception as the precise location where these two East Pacific fish faunas undergo a biogeographic "turnover." The finding helped settle a long-running question among marine scientists about exactly where this ecological transition occurs.

The region is also part of one of the planet's relatively few eastern boundary upwelling ecosystems, where ocean processes bring nutrient-rich waters toward the surface and support highly productive marine environments.

The land has thousands of years of history

The preserve's importance extends far beyond wildlife.

The area contains roughly 9,000 years of documented human history and has deep cultural and spiritual significance for the Chumash people.

Indigenous communities used resources found across the landscape, including naturally occurring tar. The material had practical applications, including sealing boats and baskets.

Before becoming a preserve, the property was used for cattle ranching. What makes its conservation significant is not that the land had never been touched by people, but that it avoided the scale of development that transformed much of Southern California's coastline.

More than 10 endangered species live here

Today, the Dangermond Preserve provides habitat for more than 10 endangered species and serves as a research site for scientists studying changing ecosystems.

The Dangermonds said they encountered numerous rare species during their early visits to the property, helping strengthen their interest in protecting the area.

The Nature Conservancy now manages the preserve as a living laboratory, where researchers study subjects including wildfire ecology, biodiversity and how species ranges are changing as the climate warms.

Why $165 million matters — and why it isn't enough

The Dangermonds' donation illustrates both the power and the limits of private philanthropy in conservation.

Their choice was notable: rather than turning the property into a private estate or developing it, they helped fund its permanent protection.

But one protected property cannot reverse the broader transformation of California's coastline.

A 2019 study by marine geologists Gary Griggs and Kiki Patsch found that the share of California's coastline protected by hard structures such as seawalls and revetments increased from 2.5% in 1971 to 13.9% in 2018.

That's a more than fivefold increase in the share of the coast covered by such structures in less than five decades.

And another threat is growing.

A 2023 study led by USGS research oceanographer Sean Vitousek estimated that between 24% and 75% of California's beaches could be completely eroded by 2100, depending on sea-level-rise scenarios and future intervention.

A preserve that raises a bigger question

The Dangermond Preserve is therefore more than a story about two billionaires donating a huge sum of money.

It represents a rare case in which private wealth helped keep a major piece of California's coast from following the development path of so much of the surrounding region.

But it also raises a difficult question: should the survival of irreplaceable landscapes depend on whether wealthy individuals are willing to spend hundreds of millions of dollars to protect them?

For younger generations growing up amid rising housing costs, climate concerns and increasingly developed coastlines, Point Conception offers a striking example of what can still be preserved.

The 24,364 acres remain protected today, providing habitat, cultural value and a place for scientists to study a changing planet.

Yet the larger challenge remains much bigger than one preserve. California's coastline continues to face development pressure, rising seas and erosion — leaving the future of its remaining undeveloped landscapes dependent not only on philanthropy, but on whether conservation is treated as a long-term public responsibility.