The trail to the rim of Sótano del Barro, one of the deepest sinkholes in the world, begins in the village of Santa María de los Cocos in the Arroyo Seco municipality of the Sierra Gorda. Reaching the trailhead itself requires a 4x4 vehicle over unpaved mountain roads, and most hikers arrange guided transport from Jalpan de Serra given the remote access. From the village, the roughly 3 km route to the rim climbs steadily and steeply through mixed pine-oak forest on a dirt and rock path, gaining several hundred metres in elevation with few flat sections to recover on. Many hikers start well before dawn, using headlamps for the lower forested stretches, in order to reach the rim in time to watch the resident military macaws leave the sinkhole at sunrise, a signature spectacle of the site. The final approach to the rim crosses exposed rock with no guardrails, and a local guide, considered mandatory for safety, keeps hikers away from unstable edges. There are no water sources, shelters, or huts anywhere along the route, so all supplies must be carried from the village. The return descent follows the same trail back to Santa María de los Cocos, taking roughly the same time as the ascent given the steep, loose footing underfoot.
Trail facts
- Trail area
- Santa María de los Cocos, Arroyo Seco municipality, Sierra Gorda
- Best season
- November to March, for clear pre-dawn skies and cooler hiking temperatures
What to bring
- Sturdy hiking boots
- Headlamp for pre-dawn starts
- 3 litres of water
- Warm layer, as it is cold before sunrise at altitude
- A local guide, mandatory to reach the rim
Location
Trailhead at Santa María de los Cocos, Municipio de Arroyo Seco, Qro., Mexico
21.4667, -99.6167 View on map
Highlights
- Rim views into one of the deepest sinkholes in the world
- Pre-dawn macaw flight spectacle from the resident military macaw colony
- Steep climb through mixed pine-oak Sierra Gorda forest
- Remote trailhead accessible only by 4x4 from Santa María de los Cocos
- Guided access to the exposed, unguarded rim edge
Tips for visiting
- Start well before dawn to reach the rim in time for the macaw flight
- Bring a headlamp for the lower forested sections in darkness
- A warm layer is essential, as temperatures are cold at altitude before sunrise
- A 4x4 vehicle is necessary to reach the trailhead village on unpaved roads
- A local guide is considered mandatory given the unguarded, exposed rim
- Carry at least 3 litres of water, as there are no sources along the climb
When to visit
November to March offers the clearest pre-dawn skies for the macaw flight and cooler daytime hiking temperatures; arriving before sunrise is essential regardless of season.
Accessibility
The steep, unpaved forest climb and exposed rim are not accessible to wheelchairs, strollers, or hikers with limited mobility.
Frequently asked questions
Why do hikers start before dawn?
The resident military macaws leave the sinkhole at sunrise in a dramatic group flight, and reaching the rim in time is the main reason for the pre-dawn start.
Is the rim trail dangerous?
The final approach crosses exposed rock without guardrails above a very deep sinkhole, so a local guide and careful footing are strongly advised.
How do hikers reach the trailhead?
The trailhead is in Santa María de los Cocos, reachable only by 4x4 vehicle over unpaved roads, often as part of guided transport from Jalpan de Serra.
Is the trail suitable for beginners?
The steep, sustained climb and exposed, unguarded rim make it better suited to hikers with some fitness and comfort around heights.