It is located between Tuxtla Gutiérrez and Chiapa de Corzo, in the state of Chiapas. It has an area of 21,789 hectares and was declared National Park on December 8, 1980.
Its canyon with steep walls, jungle vegetation, caves and waterfalls, reaches up to 1,000 meters deep, which allows the development of microenvironments with different climates in the region.
The rocks that we see today on the walls of the Sumidero Canyon, began to form about 136 million years ago from sediments and calcium minerals (limestone), this means that in ancient times, this region of Chiapas was covered by a shallow sea.
The Canyon as such, began to form 70 million years ago thanks to the action of tectonic movements called Horst-Graben, but it was until 15 million years ago, when the marine waters began to retreat from this region, that the formation that persists nowadays started.
There are two ways to travel the Canyon. One is on a round boat trip on the Grijalva River to the Chicoasén Dam. The length of the route, from the jetty to the dam, is 32 km (2 hr) and the width of the river varies from 200 to 2,000 m. And the second is to visit its viewpoints, from where you can enjoy spectacular panoramic views,