The Sumidero Canyon Ultra Marathon offers a raw, immersive experience that pulls runners and adventurers deep into one of Chiapas’ most imposing natural wonders. Stretching over approximately 50 kilometers of rugged terrain, this challenge cuts through the heart of the Sumidero Canyon near Tuxtla Gutiérrez. Here, cliffs rise like ancient walls, daring you to keep pace as the Grijalva River below twists and roars, shaping the canyon’s fierce character.

The course is no gentle stroll. Expect nearly 1,500 meters of elevation gain, with steep ascents that cling to forested ridges and descents that test your control on uneven volcanic rock and dirt trails. Tree canopies shade parts of the route, offering brief respite from the midday sun, while exposed sections give sweeping views of the canyon’s sheer faces and the water daring you forward. This is a space where nature remains fiercely itself, demanding respect and cautious strategy.

Planning your run or hike here requires preparation. Hydration is critical—the local heat tightens the grip by midday, and water sources on trail are rare or non-existent. Lightweight, sturdy footwear with solid grip will help navigate slippery stones and loose gravel. Start early to catch cooler air and avoid afternoon storms common in the rainy season. Though the terrain beckons thrill-seekers, be mindful that the canyon’s narrow passages and sudden weather shifts pose real challenges.

The ultra marathon route brings you past less trafficked viewpoints, where you can catch rare glimpses of black vultures circling thermals, orangish howler monkeys making their presence known, and orchids clinging to rocky surfaces. The canyon’s history clings beneath the surface, with its formation dating back millions of years, carved by relentless river currents. Engaging with this landscape means recognizing it not as a backdrop but as an active participant in your journey.

For casual hikers, portions of the route can be tackled as day trips, scaling shorter distances and still experiencing the raw wilderness. Seasoned adventurers will find the full ultra marathon a fierce test of endurance and awareness. Either way, the Sumidero Canyon doesn’t hand over its secrets easily—it requires focus, tenacity, and a mind tuned to the rhythm of the river’s push and the rock’s steadfastness.

In sum, this ultra marathon is an invitation to engage deeply with Chiapas’ wild side, blending adrenaline with mindfulness. With the right preparation, it becomes not just a race but a vivid encounter with one of Mexico’s most dramatic landscapes.