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San Carlos

Top 6 Lakes in San Carlos

Best lakes in San Carlos are characterized by their volcanic origins and lush rainforest surroundings. This region features several crater lakes and lagoons, often nestled within national parks or near active volcanoes. Visitors can explore diverse aquatic environments, from challenging hikes to serene viewpoints, showcasing the area's rich biodiversity and dramatic landscapes. The area offers opportunities for exploring natural monuments and experiencing unique geological formations.

Best lakes in San Carlos

  • The most popular lakes is Cerro Chato Crater Lake,…

Last updated: July 4, 2026

Swimming Spot at the Crater Lake (Parque Nacional Volcán Arenal)

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The way down is extremely steep and with clouds and light rain it is muddy and slippery.

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Cerro Chato Crater Lake

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Closed for the time being due to many poisonous snakes on the way.

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Green Lake

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This green lake contrasts with the rest of the park because it is surrounded by slightly less dense vegetation and a little higher up there are meadows with humped cows.

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Los Patos Lake

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Lago Los Patos (Duck Lake) was formed during the eruptions of the volcano.

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Lagoon of the Alligator

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Simple lodge in the middle of nature. There is a small lagoon, wild monkeys and lots of birds like aaras, toucans and many more to see. From here you can …

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Arenal Lake Viewpoint

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It's included in the Arsenal National Park entrance fee and is far less visited. You can see quite a bit of wildlife. The approach via the unpaved road from Arsenal …

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Lagoon of Chato Volcano

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Bathing opportunity in the volcano crater. The way up to the volcano is very demanding. Sturdy footwear is essential.

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Cycling in San Carlos

Tips from the Community

Werner_Fein
April 2, 2025, Arenal Lake Viewpoint

It's included in the Arsenal National Park entrance fee and is far less visited. You can see quite a bit of wildlife. The approach via the unpaved road from Arsenal should definitely be avoided with a 2WD, and in my opinion, with a 4WD.

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Vince
March 10, 2025, Lago Verde

This green lake contrasts with the rest of the park because it is surrounded by slightly less dense vegetation and a little higher up there are meadows with humped cows.

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We had to pay the 12 USD per person at the waterfall lodge and didn't even get to the crater lake. We were intercepted beforehand by the rangers who sent us back. They told us again that it was illegal for the lodge to charge entry into this area, that the trail was not their property. Call the tourist police. The lodge is getting richer and it is also a thorn in the side of the rangers and the tourist police.

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sprengan
August 6, 2022, Lago Los Patos

Lago Los Patos (Duck Lake) was formed during the eruptions of the volcano.

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Closed for the time being due to many poisonous snakes on the way.

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Bring enough water to the hike taking into account the way back, as the path can be exhausting and it takes longer than 1.5-2 hours (which is what the locals told us).

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It is not possible to get there anymore. Halfway through, there was a sign that said „do not enter“ and we had to find a way back down.

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Interesting view of the lake. The volcano is not visible from here.

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Frequently Asked Questions

What are some notable lakes to visit in San Carlos?

San Carlos is known for its volcanic crater lakes and rainforest lagoons. You can explore the challenging Cerro Chato Crater Lake, though it's currently closed due to poisonous snakes. Another popular spot is Green Lake, an intermediate viewpoint lake known for its distinct vegetation. For a unique experience, consider the Lagoon of the Alligator, which offers opportunities to see wild monkeys and various bird species.

Are there any family-friendly lakes or activities in San Carlos?

While many lakes in San Carlos involve challenging hikes, some offer more accessible experiences. For instance, the Lagoon of the Alligator is located near a simple lodge in the middle of nature, where you can observe wildlife like monkeys and birds, and enjoy circular walks in the adjacent rainforest. Always check specific access details and difficulty levels before planning a family visit.

What kind of natural features can I expect to see around the lakes in San Carlos?

The lakes in San Carlos are primarily volcanic in origin, nestled within lush rainforests. You'll encounter dramatic landscapes, including crater lakes and lagoons. Expect to see diverse aquatic environments, rich biodiversity, and unique geological formations. For example, Los Patos Lake was formed during volcanic eruptions, offering an interesting view of its origins.

What outdoor activities can I do near the lakes in San Carlos?

Beyond exploring the lakes themselves, the San Carlos region offers a variety of outdoor activities. You can find numerous cycling routes, including challenging mountain biking trails and scenic touring bicycle paths. There are also many hiking opportunities, particularly around waterfalls. For more details on routes, check out the Cycling in San Carlos, MTB Trails in San Carlos, and Waterfall hikes in San Carlos guides.

Are there any easy hiking trails around the lakes in San Carlos?

Many of the crater lakes in San Carlos, such as Cerro Chato Crater Lake and Swimming Spot at the Crater Lake (Parque Nacional Volcán Arenal), are described as challenging with steep and muddy paths. However, the Lagoon of the Alligator offers more accessible circular walks in the adjacent rainforest. Always check the current conditions and difficulty ratings before heading out.

What should I know about accessing the lakes, especially the more challenging ones?

Access to some lakes can be quite challenging. For instance, the path to the Swimming Spot at the Crater Lake (Parque Nacional Volcán Arenal) is extremely steep and can be muddy and slippery, with reports of access restrictions. Cerro Chato Crater Lake is currently closed due to poisonous snakes. Always bring sufficient water for exhausting hikes and be aware of local regulations and potential closures.

What is the best time to visit the lakes in San Carlos?

San Carlos, being in a tropical region, experiences wet and dry seasons. The dry season, typically from December to April, generally offers more predictable weather with less rain, making hiking and outdoor activities more comfortable. However, the rainforest is lush year-round. Always check the local weather forecast before your visit, as conditions can change rapidly.

What kind of wildlife can be observed around the lakes?

The rainforest surroundings of San Carlos's lakes are teeming with wildlife. At the Lagoon of the Alligator, visitors have reported seeing wild monkeys, aaras, toucans, and many other bird species. The region's rich biodiversity means you might encounter various animals, insects, and plant life unique to the tropical environment.

Are there any viewpoints offering scenic views of the lakes?

Yes, several lakes in San Carlos offer excellent viewpoints. Green Lake is specifically highlighted as an intermediate viewpoint lake, contrasting with the surrounding park due to its less dense vegetation. Los Patos Lake also provides an interesting view, though the volcano might not be visible from there.

What do visitors enjoy most about the lakes in San Carlos?

Visitors appreciate the unique volcanic origins and lush rainforest settings of the lakes in San Carlos. The dramatic landscapes, opportunities for challenging hikes, and serene viewpoints are highly valued. The region's rich biodiversity, including chances to spot wildlife, also contributes to a memorable experience.

Are there any specific tips for hiking to the crater lakes?

When hiking to crater lakes like Cerro Chato Crater Lake, it's crucial to bring sufficient water, as paths can be exhausting and take longer than expected. Be prepared for extremely steep, muddy, and slippery conditions, especially during or after rain. Always respect any 'do not enter' signs and be aware of potential access restrictions or closures.

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