Questions tagged [high-altitude]

Questions referring to everything related to mountaineering in higher altitudes (generally 10.000ft+/3000m+) like concerns about your health because of the thin air.

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What was the highest mountain climbed without supplemental oxygen, and the lowest one climbed with oxygen, before Messner's 1970 Nanga Parba ascent?

I wonder what the highest mountain (or highest elevation above sea level, not necessarily a summit) had been that was climbed without oxygen and the lowest one that was climbed with oxygen out of fear ...
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