Worked since the company's founding in 1923, the gypsum deposit on Isla San Marcos in the Gulf of California is the world's second-largest, and its port exists to ship that single mineral. Operated by Compañía Occidental Mexicana (COMSA), the facility is a captive open-roadstead loading point for dry bulk rather than a container or general-cargo terminal. It moves gypsum (calcium sulfate rock) only — more than 100 million tonnes shipped to date — chiefly to the US west coast, Canada, Japan, the Far East and Latin America. There is no routine customs or liner handling for third-party cargo here; the berth serves the mine alone. Being an island, it has no meaningful road or rail hinterland. For containers, breakbulk or general freight, forwarders should look to Santa Rosalía about 17 km away, and to Guaymas and Mazatlán.

Frequently Asked Questions

What is the UN/LOCODE of Isla San Marcos?▼

The UN/LOCODE of Isla San Marcos is MX SMI. This international code identifies ports and logistics locations worldwide.

Where is the port of Isla San Marcos located?▼

The port of Isla San Marcos is located in Mexico (Gulf of California; North Pacific Ocean).

What is the size of the port Isla San Marcos?▼

Isla San Marcos is a Very Small harbor of type Open Roadstead.

Location & Weather

27.18333, -112.10000

Transit time routes from Isla San Marcos

Mexico City → Shanghai Mexico City → Shenzhen Mexico City → Guangzhou Mexico City → Hong Kong Mexico City → Tokyo Mexico City → Busan

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The information on this page is based on publicly available transport and infrastructure data. The logistics significance of a location may change. All information without warranty.

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