Understanding Public Land in Mexico: Arroyos and Shorelines

In Mexico, arroyos and shorelines are considered public property. Arroyos refer to dry washes that occasionally flood during storms, channeling surface water into the sea. Legally, the beach area up to the mean high tide line is federal property, while the next 20 meters is designated as “Zona Federal.” In this zone, land can be utilized under a federal “concession” (an affordable annual rental), but it cannot be owned, and no permanent structures may be erected. Priority for these concessions is given to adjacent landowners; if they do not wish to apply for it, the concession can be offered to others, typically for activities like beachfront use and sales.

It’s important to note that not all arroyos are officially designated, which may lead to uncertainties about their surveyed status or whether they meet legal definitions. Because arroyo flows serve as natural pathways, they are considered the property of the federal government, allowing anyone to traverse them without needing permission from adjacent landowners. However, if the arroyo is small and runs near a populated area, it’s courteous to greet the landowners and politely request permission to pass.

1. Coastal Zones and Federal Property

The Mexican government maintains strict control over the coastline to ensure public access and environmental protection.

• The Beach (Public Domain): Any land reaching from the sea to the mean high tide line is considered federal property and is open to the public.

• The Federal Zone (Zona Federal Marítimo Terrestre): This refers to the 20-meter strip (often cited as 10-20 meters depending on specific regional surveys) of land immediately inland from the high tide line.

  • Ownership: This land cannot be owned privately; it remains federal property.

  • Concessions: Adjacent landowners can apply for a “concession”—essentially a long-term, affordable lease—to use this land.

  • Restrictions: While you can use a concession for landscaping or temporary beach setups, permanent structures are generally prohibited to maintain the integrity of the coastline.

2. Arroyos: Natural Pathways and Legal Status

Arroyos are dry creek beds or washes that serve as vital drainage systems during heavy tropical storms, channeling runoff into the ocean.

• Public Access: Under Mexican law, arroyos are considered federal property because they function as natural watercourses. Legally, anyone has the right to traverse an arroyo without seeking permission from those who own the land alongside it.

• Designation Uncertainty: Not every wash is “officially” surveyed or registered as a federal arroyo. This can lead to ambiguity regarding exactly where private property ends and the federal wash begins.

• Development Risks: Because these areas are prone to flash flooding, building near or within an unsurveyed arroyo carries significant physical and legal risks.