Almost every traveller who books a walk in Manuel Antonio asks about snakes at some point, usually in a slightly lowered voice. The honest answer is the one most websites will not give you: on a normal morning walk through Manuel Antonio National Park, the odds of seeing a snake are low, and the odds of a snake being a problem are lower still. Here is what actually lives in the forest, why you rarely see it, and what a guide does about it.

Are there snakes in Manuel Antonio National Park?

Yes — Costa Rica’s central Pacific forests are home to several snake species, and the park’s trails run straight through that habitat. But most visitors who walk the park never see one. Snakes are shy, most are nocturnal or spend the day hidden in leaf litter and tree hollows, and they move away from the vibration of footsteps long before a group arrives. On a busy morning the main trail carries hundreds of people; that is not where a snake wants to be.

When our guides do find one, it is usually because they were looking for it — a coil on a low branch at eye level, or a shape in a pile of dry leaves that a visitor would have walked past. That is the difference between hiking the park and being guided through it.

What snake species actually live in the park?

The ones guides and locals mention most often are:

  • Eyelash pit viper (Bothriechis schlegelii) — small, venomous, and famous for the raised scales above its eyes. It ambushes from vegetation rather than the ground, so it is found on low branches, palm fronds and heliconia. Colours range from bright yellow to green and mottled brown.
  • Boa constrictor — non-venomous and the largest snake you are likely to encounter. Often seen resting in trees or crossing quietly near the beach trails.
  • Vine snakes — extremely thin, brown or green, and so well camouflaged they look like a hanging stem until they move. Harmless to people.
  • Cat-eyed snakes — slender nocturnal snakes that hunt frogs and frog eggs; a regular find on night walks, not on daytime trails.
  • Fer-de-lance (Bothrops asper, terciopelo) — the species with the most serious reputation in Costa Rica. It exists in lowland Pacific forest in general, but sightings on the park’s main tourist trails are rare; it favours quiet, dense, undisturbed ground away from constant foot traffic.

We will not promise you a sighting of any of them. Wildlife is wildlife — some mornings the forest gives you a boa on a branch, and most mornings it gives you monkeys, sloths and birds instead.

Are the snakes in Manuel Antonio venomous?

Some are, most of what you might encounter is not. Costa Rica has venomous pit vipers and coral snakes, and a few of those species occur in this region — the eyelash pit viper is the one most relevant inside the park. The majority of snakes here, though, are non-venomous: boas, vine snakes, cat-eyed snakes and various small ground species that eat frogs, lizards and rodents.

The practical point is that identification is not a traveller’s job. A green snake on a branch could be a harmless parrot snake or an eyelash viper, and telling them apart at three metres is a skill built over years. That is why the rule is simple: do not touch, do not approach, let the guide look first.

Is it dangerous to hike the trails because of snakes?

No, not with normal precautions. Stay on the marked trail, do not reach into brush, hollow logs or leaf piles, do not step off the path for a photo, and do not put your hands where your eyes have not been. Wear closed shoes — trail runners or light hiking shoes are plenty; you do not need snake boots for this park.

The main trail network in Manuel Antonio is wide, well maintained and heavily travelled, which is exactly the environment snakes avoid. In daily guiding, the wildlife our guides actually spend their time pointing at is monkeys, sloths, iguanas and birds. Snakes are the rare bonus, not the hazard around the corner.

What should I do if I see a snake on the trail?

Stop. Keep your distance — at least two metres, more if you can. Do not try to move it, prod it with a stick, or crowd it for a photo. Tell your guide, and let them identify it and decide how close the group gets.

Nearly every snakebite incident in Costa Rica involves someone handling, cornering or accidentally stepping on the animal. A snake that has been seen and given space is not a threat; it wants the encounter over as much as you do.

What time of day are snakes most active?

Most of the species here are nocturnal or crepuscular. They hunt after dark and rest during the day, which is the single biggest reason daytime visitors rarely see them. On a morning walk, a sighting usually means a snake resting in vegetation, not one on the move.

If snakes and other night species are what you came for, the honest advice is that a daytime park walk is the wrong tool. The forest after dark is an entirely different place — see our breakdown of the best time of day to see wildlife in Manuel Antonio for how the morning, midday and night windows compare.

Can I see snakes on a night tour?

Your chances go up considerably after sunset, because that is when the nocturnal species come out to hunt — along with frogs, insects, sleeping birds and the animals most day visitors never meet. Cat-eyed snakes and eyelash vipers are among the more realistic night finds. Still no guarantees; a night walk is a better lottery ticket, not a sure thing.

Note that Manuel Antonio National Park itself closes in the evening, so night walks run on private reserve trails and in the surrounding forest rather than inside the park boundary. Our Damas mangrove night trip is the other after-dark option, with a different set of species on the water.

Do I need to worry about snakes on the beaches?

Very little. The beaches inside the park — Playa Manuel Antonio, Playa Espadilla Sur, Playa Gemelas — are open sand and rock, not snake habitat. Boas are occasionally seen in the trees along the beach trails, which is a photo opportunity, not a problem.

What you should actually watch on the beach is your bag: the white-faced capuchins there are practised thieves, and unattended food will be taken. There is more on the shoreline wildlife in our guide to the crabs and tide pools of Manuel Antonio.

Is there medical help nearby if something happens?

Yes. Quepos, about seven kilometres from the park entrance, has a hospital, and Costa Rica’s public health system stocks antivenom — the country produces its own at the Instituto Clodomiro Picado. Park rangers are present on the trails during opening hours. This is worth knowing so you can stop thinking about it: the scenario is unlikely, and it is covered.

Standard travel insurance and the emergency number 911 cover the rest. Your guide carries a phone and knows the route out.

What is the best way to see wildlife safely, snakes included?

Go with a guide who is on the trail daily. On the Classic Group Tour ($30/person) the guide sets the pace, knows which trees and leaf piles have been worth a second look this week, carries a spotting scope for everything too high or too still to see with the naked eye, and handles any wildlife encounter — snakes included — so you can watch instead of worry.

Put differently: a guide is not there because the forest is dangerous. A guide is there because without one, you will walk past almost everything in it.

Guide: Jason Solano Zamora, ICT-certified naturalist guide and founder of Costa Rica Wakoo Tours.

Travelling in December 2026 or January 2027? That is the driest, busiest stretch of the year in Manuel Antonio and the morning departures fill first. Book your Manuel Antonio tour for December 2026 – January 2027 — the Classic Group Tour stays at $30 per person, naturalist guide and spotting scope included, park entrance paid at the gate. The park closes every Tuesday, 9 of them inside that window, so the date you pick matters.

Not sure which morning to take? WhatsApp us at +506 8514-1361 and we will check availability for your dates.