Depth of Lake Atitlán: facts, records, and interesting tidbits

The depth of Lake Atitlán is one of its most extraordinary features: with a maximum of 340 meters and an average depth of 188 meters, it is the deepest lake in Guatemala and one of the deepest in all of Central America. This characteristic is a direct result of its origin as a volcanic caldera, formed 84,000 years ago.

Scientific facts about the lake's depth

• Maximum depth: ~340 meters (area in front of San Pedro La Laguna)
• Average depth: ~188 meters
• Surface altitude: 1,562 meters above sea level
• Surface area: ~130 km²
• Length: 18 km | Width: 12 km
• Surface temperature: 18–22°C depending on the season

Why Lake Atitlán is so deep

The volcanic origin of the lake explains its exceptional depth. The lake was formed in the caldera (depression) created by the collapse of a supervolcano. Unlike lakes formed by glaciers or rivers, volcanic calderas can create extremely deep depressions. Subsequently, the volcanoes Atitlán, Tolimán, and San Pedro emerged from the bottom without significantly raising the water level.

The bottom of Lake Atitlán: an archaeological mystery

In addition to its geological depth, the bottom of the lake holds archaeological secrets. Researchers have documented remains of submerged Mayan structures, possibly from the pre-Hispanic city of Samabaj, which sank due to rising lake levels centuries ago. Scientific diving explorations continue to reveal ceramic fragments, pillars, and plazas underwater.

To learn more about the lake's unique characteristics, consult the complete information on Lake Atitlán or visit the Lake Atitlán guide. If you want to see the lake from above, paragliding offers the most spectacular perspective.