Sierra Negra is a subpeak of Orizaba and was our next acclimatization climb. Sierra Negra is located within the Pico de Orizaba National Park. The mountain is the site for two of the world’s premier astronomical instruments, the Large Millimeter Telescope and the High Altitude Water Cherenkov Observatory.
We drove from Puebla to the little town of Zoapan and the home of Orizaba Mountain Guides (OMG!) who would be helping out with driving our gear and assigning a couple extra climbing guides. They had a cute little compound with cute decorations – plus cats and chickens!











On the roof looking at Orizaba – Sierra Negra is on the ridgeline to the right.












The High Altitude Water Cherenkov Experiment or High Altitude Water Cherenkov Observatory (also known as HAWC) is a gamma-ray and cosmic ray observatory located on the flanks of the Sierra Negra – that is what the gold colored drums are in this photo.
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