"No hay observación de tortugas y la visita al estero es a través de guías locales."
That line sits near the top of SINAC's Spanish-language page for Parque Nacional Marino Las Baulas. It means there is no turtle observation, and visits to the estuary go through local guides. A few lines further down, the same page sets out the rule that matters most to anyone who walks Playa Langosta at the end of the day. The park is open from 6:00 AM to 6:00 PM, but during the turtle nesting season, October through February, people may stay on the beach only until 5:00 PM.
That season starts today, October 1, 2026, and the 5 PM limit runs through February 2027. Most people associate Las Baulas with Playa Grande. The 5 PM limit is a Langosta rule too. SINAC names Langosta, Grande and Ventanas as the three beaches the park was created to protect for nesting leatherbacks, and it lists the San Francisco estuary among the park's protected wetlands.
The rules were written for the leatherback. The turtles they mostly protect today are a different species.
The Park Boundary Runs Through the Evening
From October through February, SINAC moves the end of the beach day up by an hour. The rest of the park's rules apply year-round. Langosta residents who use the beach every day mostly know them, but they carry more weight once nests may be in the sand.
| Rule | When it applies | Source |
|---|---|---|
| Beach stays end at 5:00 PM | October through February | SINAC, Spanish park page |
| No pets or domestic animals | Year-round | SINAC |
| No vehicles on the beach | Year-round | SINAC, citing traffic law No. 7331 |
| No bonfires | Year-round | SINAC |
| No alcohol, single-use plastics or loud sound systems | Year-round | SINAC |
| No horseback riding | Year-round | SINAC |
| Night visits only with a guide, all lights off | Nesting season | The Leatherback Trust |
SINAC's list also rules out smoking, taking stones or plants, feeding or harassing animals, walking off designated public-use areas, and commercial activity inside the park boundary. The Leatherback Trust's own park rules add a few more: stay below the high tide line, no flash photography, no fishing and no camping.
The lighting request is the one that reaches past the sand and into homes. The Leatherback Trust asks people near the beach to turn out their lights and close their curtains, because lights can confuse nesting turtles and hatchlings. We found no current source that makes this an enforceable rule for Langosta homes or businesses. It is a conservation request from the organization that runs seasonal patrols at Playa Grande, and it applies to every lit terrace and pool deck facing the water.
The Two Official Pages Disagree About Turtle Viewing
Anyone who goes looking for a guided night walk this season will find two different answers from the same agency. SINAC's English-language page still describes a turtle-viewing season from October 20 to February 15. It lists groups of up to 15 people with a tourism promoter or local guide, two official entrances with a combined cap of 120 visitors, no photographs or touching, and red-filtered flashlights held only by the guide. The Spanish page carries the note that there is no turtle observation. It gives no start date and no reason. It still mentions a natural history talk for people arriving for the turtle tour, which is left over from the older format.
Neither page carries a publication date. The Spanish note is the more specific and appears to be the more recent of the two, so we treat it as SINAC's current position until park rangers say otherwise. Before booking anything or promising out-of-town guests a turtle night, ask at the ranger station.
Night work on these beaches has not stopped. Earthwatch lists 2026 expedition dates of October 30 to November 7 and December 4 to 12. Those are research trips monitoring nesting turtles at Playa Grande and Playa Cabuyal, not public tours. The Leatherback Trust recruits field biologists and volunteers for night and morning patrols, tagging, nest protection and hatchery monitoring at Playa Grande, with a patrol season of October through March. Closer to home, SOS Grande, short for Sostenibilidad en Grande, runs a year-round community sea turtle monitoring program with other organizations across Las Baulas and Tamarindo beach. Its page does not say whether that includes Langosta.
What the Season Protects, in Numbers
The most recent detailed public count we found covers Playa Grande during the 2023–24 season, which ran from October 15, 2023 to March 15, 2024. Earthwatch published it in its 2024 field report. We found no turtle count specific to Langosta and no public figures for the 2024–25 or 2025–26 seasons. The table below is the closest available picture of the sand next door, not a census of Langosta's beach.
| Species, Playa Grande, 2023–24 | Females identified | Estimated nests | Average eggs per clutch |
|---|---|---|---|
| Leatherback | 3 | Not reported | 52 |
| Green, called black turtle locally | 41 | 127 | 60.3 |
| Olive ridley | 30 | 71 | 97.6 |
Three leatherbacks against 41 green turtles is the number that changes the picture. The park exists because of the leatherback, which SINAC calls critically endangered worldwide. The Leatherback Trust puts the decline of the East Pacific leatherback population at more than 97% in recent decades, mainly from egg harvest and fishing bycatch. Earthwatch describes leatherback nesting at Grande as still low and "worrying." It also reports that more female green turtles nest there every season.
Two of the three leatherbacks were first-time nesters. That is 67%, against an expected 30%, and the researchers read it as a hopeful sign for a population trying to rebuild. Olive ridleys went the other way. Earthwatch called their numbers low and said the species needs closer monitoring.
Why the Rules Still Fit a Beach With So Few Leatherbacks
On numbers alone, the 5 PM exit could look like a holdover from a time when leatherbacks came ashore in large numbers. The Earthwatch figures point the other way. In 2023–24, Playa Grande produced an estimated 6,019 green turtle hatchlings and 5,775 olive ridley hatchlings. Those are thousands of small turtles crossing dark sand toward the water during the same months the park limits beach hours. SINAC lists all three species as visitors to the park.
A 2023 Teletica feature on Las Baulas, which included Playa Langosta, linked the leatherback's decline to egg theft, human encroachment, and sound and light pollution. Those are the same pressures the park's rules on lights, loud sound and evening beach hours target, and on Langosta they reach every home and terrace that faces the sand.
Working Around the 5 PM Line
For people who use Langosta's beach every day, the season mostly changes the timing of a few habits.
- Plan the late walk earlier. The sand closes at 5:00 PM until February, so a beach walk, surf session or dog-free stroll along the tideline needs to end by then.
- Watch the sunset from a terrace instead of the sand. Langosta Beach Club's calendar lists a daily Sunset Happy Hour from 4 to 6 PM, running September 28 through October 31, 2026. Its American Thanksgiving dinner is on Thursday, November 26, 2026, from 5 to 9 PM. The club notes that it sells out quickly.
- Use the estuary for daytime outings with guests. SINAC says estuary visits run through local guides and need no advance booking.
- Dim the beach-facing side of the house. Turning off lights and closing curtains near the beach is one of the steps The Leatherback Trust asks of people near the beach.
- Leave turtles and tracks alone. SINAC bans touching, feeding or harassing wildlife in the park. The Leatherback Trust asks visitors to respect the turtles and take no eggs.
- Confirm before promising a turtle night. The two SINAC pages disagree, so check the current status with park rangers before you book a guide or invite guests.
The 5 PM rule lasts through February, and the next official word on turtle viewing will come from the ranger station at Las Baulas.
At Gold Coast Realty, our team has lived and worked along this coast for many years, and we follow the park rules on Langosta's beachfront as closely as the market. If you own property facing the sand and want to know how park boundaries, lighting and access affect it, talk to a local expert.
