San Pedro Mártir Island

San Pedro Mártir Island is a rocky formation in the Gulf of California marked by sheer cliffs and sparse plant life. The jagged terrain and difficult water approaches define the landscape.

The island was heavily exploited for guano extraction during the 1800s, with material shipped to Europe as fertilizer. This period of intensive harvesting left lasting marks on the landscape.

The Seri people relied on this island for traditional gathering practices, building specific structures to support their collection activities across generations. The place held deep meaning in their connection to the Gulf's resources.

Access to the island is restricted to protect its natural environment and wildlife. Visitors can observe it from boat tours rather than landing on the site itself.

The island hosts the world's largest breeding grounds for blue-footed and brown boobies. These seabirds create a remarkable natural display that observers can witness from afar.

Location: Sonora

Part of: Islands and Protected Areas of the Gulf of California

GPS coordinates: 28.38028,-112.30694

Latest update: December 8, 2025 19:50