The sanctuary is located at such a high elevation that many visitors experience physiological symptoms of altitude sickness.
The rock formations are of volcanic origin, dating back to the Cenozoic era.
The site contains over 4,000 distinct rock formations, many of which are officially named based on their resemblance to animals or humans.
The area is home to the Huayllay hot springs, which are geothermally heated and utilized by locals.
The sanctuary is a protected area under the Peruvian National Service of Natural Protected Areas (SERNANP).
Huayllay National Sanctuary, often referred to as the Forest of Stones, is a geological site located at an altitude of approximately 4,300 meters above sea level. It features a vast collection of volcanic rock formations shaped by centuries of glacial, wind, and water erosion into zoomorphic and anthropomorphic silhouettes. The sanctuary spans over 6,800 hectares within the Pasco region of the Peruvian Andes. The unique topography consists of massive granite and limestone clusters set amidst high-altitude puna grasslands. Visitors navigate through designated trails that wind through these towering rock labyrinths. The area is also home to diverse high-Andean fauna, including vicuñas, viscachas, and several species of eagles and hawks. It serves as a significant site for both geological study and traditional local tourism.
The 'El Elefante' (The Elephant) formation, which is one of the most recognizable and accessible sculptures at the site.
Acclimatize to high altitude in a lower town for at least 24-48 hours before attempting to hike the trails.
Bring sun protection and multiple layers of clothing, as temperatures drop significantly when the sun goes behind clouds.
Carry a physical map or ensure you have offline GPS, as rock corridors can be disorienting.
Attempting to explore the labyrinthine sections without a local guide or proper navigation tools, as it is easy to become lost.
Open year-round, though trails may become muddy or difficult to traverse during the rainy season from December to March.
Respect the 'leave no trace' policy by not climbing on or marking the rocks; dress in warm, windproof layers and wear sturdy hiking boots.
