BCS Identifies 40 Dark Sky Astronomical Sanctuaries

More than 40 sites across Baja California Sur meet international standards for astronomical observation, according to a scientific project by researchers from the Autonomous University of Baja California Sur (UABCS). At least seven of these locations have been confirmed to offer conditions comparable to world-class astronomical sanctuaries, based on light pollution measurements.

Baja California Sur has established itself as an exceptional region for stargazing thanks to its low population density, minimal light pollution, and consistently clear skies. Since December 2023, researchers have surveyed dozens of sites, identifying more than 40 that meet the necessary criteria for celestial observation. Of those, seven locations achieve international quality standards to be considered astronomical sanctuaries.

One of the most notable sites is San Evaristo Hill in La Paz, which recorded a light measurement of 21.55, an ideal level for observing star-filled skies. According to data collected, 40 sites across the state registered magnitude values above 21.2, a benchmark for high-quality astronomical viewing.

Several of these locations also qualify as candidates for the 2025 State Science and Technology Award in Baja California Sur. Among them are Comondú’s Casi Llanito (21.85), La Purísima, Llanito de los Becerros, Hacienda Ramona, and Mirador Purísima. In the municipality of La Paz, key sites include San Evaristo, Las Pilas, San Antonio de la Sierra, Las Pocitas, Las Ánimas, Mirador Mechudo, Rancho Verde, El Califín, El Saladito, La Joya, Ensenada de Muertos, and Iglesia San Blas.

In Loreto, Playa Notri has been recognized, while in Los Cabos, qualifying areas include Cañón de la Zorra, Rancho Ecológico Sol de Mayo, Sierra de La Laguna, and El Refugio. In Mulegé, Playa El Coyote (21.73), Volcán Las Tres Vírgenes (21.72), Playa Los Naranjos, Playa Santispac, Piedra Volcánica, Santa Martha, Playa El Requesón, and San Lucas also meet the high observation standards.

Dr. Miguel Ángel Norzagaray, a professor at UABCS and member of the Mira Astronomical Society, explained that the initiative reflects collaboration between local and state institutions. “This is a joint effort by several organizations working to identify the best skies in Baja California Sur for astronomical observation, not only to protect them but also to promote their use for tourism and research,” he said.

Norzagaray noted that, with support from the Ministry of Tourism and Economy (SETUE), the project aims to both safeguard these sites and develop them as tourist destinations. “We are training tourism service providers to help them make the most of the night sky, teaching them what basic instruments to use and how to deliver quality stargazing experiences,” he added.

These efforts have positioned Baja California Sur as a new reference point for both amateur and professional astronomy, while encouraging sustainable tourism linked to the natural beauty of the night sky.

The Mira Astronomical Society and COSCyT plan to publish the final list of top celestial observation sites in each municipality in the coming months, allowing residents and visitors alike to experience the starry skies of southern Baja under the best possible conditions.

Founded in 1988, DarkSky International works to preserve areas of natural darkness for cultural, scientific, and educational purposes, as well as for public enjoyment. The newly identified sanctuaries in Baja California Sur align with that mission, offering not only a clear window into the cosmos, but also a model for conservation and responsible tourism.

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Fernando Rodriguez
Fernando Rodriguez began his journey in journalism at an early age. In the 6th grade, he created his own one-page sports newsletter, repeating the effort again in the 8th grade. These early projects eventually led him to become the editor of The Herald, San Jose High School’s 12-page bi-weekly newspaper, during his junior and senior years...
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