The caldera was formed by a VEI-6 eruption in the 13th century, which is considered one of the largest volcanic events in the region's history.
The high concentration of minerals, including sulfuric acid and magnesium, gives the water its vibrant green-blue hue.
The water temperature remains consistently cold throughout the year, typically hovering around 12 to 14 degrees Celsius.
The caldera rim spans approximately 3 kilometers in diameter, offering a complete 360-degree walking circuit.
Despite the volcanic origin, the lake does not have a formal outlet, leading to a closed hydrological system.
The local indigenous community organizes the trail maintenance and boat rentals within the crater basin.
Quilotoa Lake is a water-filled caldera located in the Ecuadorian Andes, formed by a volcanic collapse approximately 800 years ago. The lake reaches a depth of approximately 250 meters and is characterized by its distinct turquoise color, caused by dissolved minerals. It is situated at an elevation of 3,914 meters above sea level within the Cotopaxi Province. The caldera is part of a larger volcanic complex and remains geologically active. Visitors can hike the rim or descend into the crater basin via a steep trail. The surrounding ecosystem is alpine tundra, or paramo, which supports hardy vegetation such as chuquiraga shrubs. Indigenous Kichwa communities inhabit the nearby village of Quilotoa and manage much of the local tourism infrastructure.
The main viewpoint at the entrance to the village of Quilotoa, which offers a panoramic vista of the crater lake.
Acclimatize to the high altitude for at least two days in a lower Andean town before visiting to prevent altitude sickness.
Bring layers, as temperatures drop rapidly and weather conditions can shift from clear to foggy within minutes.
Hire a mule for the return trek if you find the steep ascent from the lake shore physically challenging.
Attempting the full rim hike without proper navigation equipment or map, as sudden fog can quickly obscure the trail.
Practice Leave No Trace principles; maintain silence to respect the local indigenous community's cultural connection to the site; do not swim in the lake as it is considered sacred.
