Green Cay

You can land, but only on one beach, and you cannot walk the island

This is the question people search, and the answer is specific rather than yes or no.

The Réserve Naturelle Nationale de Saint-Martin states that landing is authorised only on the western beach, which lies outside the reserve boundary, and that the rest of the site is closed to entry except for water-based activities. Walking is restricted to the sand dune. Motor vehicles, dogs and fires are prohibited. Under Prefectural Order 2020-142, commercial activities on the islet are banned outright.

That last rule explains the structural difference between Green Cay and Pinel, three kilometres up the coast in the same reserve. Pinel has beach restaurants and a shuttle. Green Cay has neither and cannot.

The design of the rule is worth understanding, because it is elegant. The boundary was drawn to leave one small beach outside the reserve so that people can step ashore, while the interior, the rocky middle and the exposed eastern side stay closed. You are being given a doorstep, not a house.

The islet is about 13 acres, roughly twenty times smaller than Tintamarre, with a limestone coral base, a north-south orientation and three distinct parts: the western beach, a rocky middle, and an Atlantic-facing eastern side. The beach itself is a sand spit of about 95 metres.

The birds are the reason for the rules

Green Cay is a nesting site for white-tailed tropicbirds and white-cheeked pintails, and the reserve's deputy director is quoted explaining that mooring is restricted in most areas to protect the birds that come there and nest.

That is the causal chain a visitor almost never gets. A small limestone islet with no predators and no people is a seabird refuge, and every restriction on the list, the mooring limits, the no-landing zones, the dune-only walking, the dog ban, follows from that rather than from generic conservation instinct.

It also explains why the mooring capacity is so small. The reserve's own site gives a single buoy for vessels up to 10.5 metres and 8 tons; the Collectivité tourist office says two buoys for boats under 35 feet. We could not resolve which is current, and either way the practical point holds: the islet's carrying capacity is one or two boats at a time, deliberately. Overnight mooring is prohibited. Anchoring in reef or seagrass is forbidden throughout the reserve, so anchoring here means sandy bottom only, and only when no buoy is free.

One unusual permission: commercial night diving is allowed at Caye Verte with the reserve management's permission, one of only three sites in the reserve where it is permitted at all.

The snorkeling, and what a fishing ban does

This is the reason to come, and the reserve's own explanation of why it works is unusually direct. It calls the site just east of Green Cay superb and attributes the density of life to the fishing ban: placed under the protection of the nature reserve, fishing is forbidden, which allows fauna and flora to develop freely.

The reef runs along the islet's northern and southern edges and is accessible by both diving and snorkeling, and you snorkel from the mooring buoys. The surrounding seagrass beds are important turtle feeding grounds.

So Green Cay is a compact, legible before-and-after argument sitting a few hundred metres off the island's busiest beach: same water, different rules, visibly different fish. That is a better case for protection than any list of species.

The islet's own reef, on those northern and southern edges, is also what shelters the calm water of Orient Bay behind it. The eastern side is a completely different proposition, exposed to the open Atlantic and taking the trade winds directly.

One thing to keep straight: turtles feed in the seagrass around the islet. Whether they nest on the islet itself is claimed by travel sites and not confirmed by any reserve material we retrieved, which named seabird nesting and turtle feeding habitat only.

A worked example of why not to trust travel-site coordinates

One villa-marketing page publishes a Green Cay entry giving coordinates that land near Cole Bay on the Dutch side, most of the way across the island from the actual islet. It gives an area of 2.5 acres against the 13 acres the Collectivité reports, describes dense forested areas and resident snakes, and advertises guided eco-tours landing on the island, which would be a prefectural-order infraction.

Every element of that is wrong, and the page is written confidently.

We are keeping it here as a teaching example rather than out of spite. This is the recycled-and-generated content problem across St. Maarten and St. Martin beach coverage in one page, and it is checkable in about ninety seconds against the reserve's own material.

It is also why this record's own coordinates field is empty. There is a gazetteer figure for the islet, and it is not going on the page until somebody has confirmed it.