Discover Acatenango & Fuego Volcanoes

Acatenango and Fuego form La Horqueta—a volcanic massif representing the southward end of a north-to-south chain of eruptive centers in Guatemala’s Sierra Madre. The chain reflects a long-term migration of volcanism: the northernmost center, Ancient Acatenango, was active roughly 70,000 years ago; Yepocapa (3,880m, Acatenango’s lower northern summit) was active from about 70,000 to 20,000 years ago; Pico Mayor (3,976m) was constructed after that. Volcanism then migrated further south to build Meseta—an intermediate volcano whose remains form the scarped shoulder visible between the two summits today. Meseta collapsed catastrophically around 8,500 years ago, producing a debris avalanche extending 50 km onto the Pacific coastal plain. Modern Fuego was constructed on the site of Meseta’s collapse.

The complex sits on the Pacific Ring of Fire above the subduction zone where the Cocos Plate descends beneath the Caribbean Plate at approximately 7–8 cm per year. Between the two summits, La Meseta valley—the remnant of the collapsed intermediate volcano—serves as the approach route for Fuego flank hikes. The valley floor is covered in hardened lava and pyroclastic deposits from Fuego’s recent eruption cycles, making it one of the most accessible active volcanic landscapes in the Americas.