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Bisonte americano en la Reserva El Santuario, Cuatro Ciénegas

Ecological Reserve · Cuatro Ciénegas, Coahuila

El Santuario: where the bison came home

3,700 hectares (about 9,100 acres) of Chihuahuan Desert grassland under regeneration. In November 2025, the American bison returned to this valley after more than a century away.*

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Can you see bison in Mexico?

Yes. The El Santuario ecological reserve in Cuatro Ciénegas, Coahuila is home to a herd of American bison reintroduced in 2025 by Fundación Pro Cuatrociénegas. You can visit on guided 3–4 day expeditions, offered on a few dates each year. These bison aren't a tourist attraction — they are ecosystem engineers, regenerating the grassland and helping recharge the aquifer that feeds the valley's famous pools.

The story

More than a century of absence

For thousands of years, American bison roamed these plains. Their grazing gave the grassland its shape — turning the soil, spreading seeds, fertilizing the land as they moved. When they disappeared from northern Mexico, the grassland began to lose the very force that kept it alive.

In November 2025, after years of work, Fundación Pro Cuatrociénegas brought them back.* The first bison stepped onto El Santuario before the eyes of the community, conservation allies, and press from across the country. It wasn't just the relocation of a species — it was the return of a missing piece of the valley.

La manada de bisontes en los pastizales de El Santuario
La sierra y el desierto del valle de Cuatro Ciénegas
The bison's work

An ecosystem engineer

Every day, the herd does work no machine can replicate:

  • Grazing in motion. Under holistic management, the bison graze planned areas and then let the land rest — mimicking the natural rhythms of the great herds.
  • Soil that breathes. Their hooves break the soil's crust so rainwater soaks in instead of running off.
  • Water for the pools. A healthy grassland recharges the aquifer — the same one that feeds the turquoise pools that make Cuatro Ciénegas unique.
  • Life returns. Where the grassland recovers, other Chihuahuan Desert species return with it.

El Santuario is part of the Don Martín protected natural area* and aims to become a replicable model of grassland regeneration for all of northern Mexico. Explore our projects →

Biocultural alliance

A legacy that is also returning

For the Ndé Nation, the bison is not just an animal — it is part of their history, their culture, and their ancestral bond with this land. The foundation works in alliance with the Ndé Nation so that the herd is managed in a culturally grounded way, strengthening a biocultural legacy that was nearly lost along with the bison.

Circular economy

A model that sustains the valley

El Santuario is designed to sustain itself and benefit the region:

Every visit and every gift keeps this circle turning.

Frequently asked questions

Before your visit

Where is El Santuario?
In the municipality of Cuatro Ciénegas, Coahuila, in northern Mexico, within the Don Martín protected natural area. The meeting point for visits is Rancho San Isidro.*
How many bison are there?
The exact number is confirmed and updated regularly. We'll share the latest count when you book an expedition.
Can I visit on my own?
No. El Santuario is a reserve under active regeneration. Visits happen only on guided expeditions with scheduled dates — it's how we protect both the herd and the grassland.
How can I help?
Donate, book an expedition, or share the story of the bison's return. Every dollar becomes regenerated grassland and water for the valley.
La manada de bisontes en los pastizales de El Santuario

Gone for 200 years*. Today their calves graze here.

And you can come meet them.

Visit El Santuario Early-access list Support the restoration Your gift regenerates the valley

Follow the herd

One photo and one fact from El Santuario, once a month. No spam.

* Facts pending verification before launch.