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Background to Pena Colorada
In May of 1981 a reconnaissance trip to the Santo Domingo Canyon was fielded to look for resurgence springs for Sistema Huautla. During this trip, Bill Stone and Pat Wiedeman were shown the entrance to the Cueva de la Peña Colorada, an enormous fossil resurgence cave that, in high water, still issued enough water from its entrance to fill a 20 meter wide arroyo. During the dry season it is possible to descend more than 30 meters vertically into the cave to where one quickly comes to Sump 1, the first underwater tunnel. During a return in 1992, which included…
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