Qualla: Sumidero Canyon: The Chasm That Swallowed Explorers

Sumidero Canyon: The Chasm That Swallowed Explorers: Introduction

Sun, 22 Mar 2026 00:00:00 GMT

Photo credit Raymundo1972, CC BY-SA 3.0. In 1895, three Frenchmen entered Sumidero Canyon by boat. They drowned. In 1932, an American attempted the same passage. He too perished. The locals were not surprised. Legends had long warned of the canyon's dangers - its crocodiles, its currents, its reputation for consuming those who ventured in uninvited. It took until 1960 for anyone to successfully navigate the full length, when a detachment of Mexican soldiers nicknamed the "red handkerchiefs" managed the twenty-kilometer crossing. What they found was a gash in the earth so deep and narrow that sunlight reaches the river only at midday: walls of limestone rising 1,000 meters, the Grijalva River making ninety-degree turns through a passage just thirteen kilometers long, and a geological history stretching back 35 million years - roughly contemporary with the Grand Canyon.

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Image: Raymundo1972 | CC BY-SA 3.0

Sumidero Canyon: The Chasm That Swallowed Explorers: Thirty-Five Million Years of Splitting Rock

Sun, 22 Mar 2026 00:00:00 GMT

Photo credit AlejandroLinaresGarcia, CC BY-SA 3.0. The canyon began forming when cracks in the Earth's crust met the relentless erosive force of the Grijalva River. The exposed walls tell the story in layers: limestone from the Upper Mesozoic containing fossils of marine creatures, evidence of a time when this highland landscape ...

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Image: AlejandroLinaresGarcia | CC BY-SA 3.0

Sumidero Canyon: The Chasm That Swallowed Explorers: The Chiapa's Last Defiance

Sun, 22 Mar 2026 00:00:00 GMT

Photo credit Raymundo1972, CC BY-SA 3.0. The indigenous Chiapa people controlled the Central Valley before the Spanish arrived. Their origins remain debated - some theories trace their migration from as far south as Nicaragua or Paraguay - but their main settlement was at Chiapa de Corzo, near the canyon's southern entr...

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Image: Raymundo1972 | CC BY-SA 3.0

Sumidero Canyon: The Chasm That Swallowed Explorers: A Dam That Powers a Nation

Sun, 22 Mar 2026 00:00:00 GMT

Photo credit Thelmadatter, CC BY-SA 3.0. At the canyon's northern end sits the Chicoasen Dam - formally the Manuel M. Torres Dam - constructed between 1974 and 1980. Its reservoir covers approximately 2,193 hectares and employs about 600 workers. The dam's hydroelectric station is among Mexico's most productive, with th...

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Image: Thelmadatter | CC BY-SA 3.0

Sumidero Canyon: The Chasm That Swallowed Explorers: Beauty and Twelve Tons of Garbage a Day

Sun, 22 Mar 2026 00:00:00 GMT

Photo credit AlejandroLinaresGarcia, CC BY-SA 3.0. Sumidero Canyon is the second most visited tourist site in Chiapas. Boats depart from docks at Chiapa de Corzo, threading through the narrow passage while guides offer environmental, historical, and cultural commentary. But the canyon's popularity cannot mask a growing crisis. Up...

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Image: AlejandroLinaresGarcia | CC BY-SA 3.0