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Summit facts & stats

4 sourced facts about mountain summits, especially Mount Everest, each with the context behind the number. 4 more are in today's round and appear here after it closes.

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The basics

Climbers using supplemental oxygen on Everest are roughly how much more likely to reach the summit than those without it?

Answerabout 20 times

Bottled oxygen sharply improves a climber's odds in the mountain's brutally thin air near the top.

Source: Alan Arnette, 'Everest by the Numbers' alanarnette.com

Expert level

About how many different people have summited Everest at least once, as of 2025?

Answerabout 7,563

The total number of summits is much higher because many climbers and guides summit more than once.

Source: Alan Arnette, 'Everest by the Numbers' alanarnette.com

Non-standard Everest routes account for only 1.4% of all summits, but roughly what share of all deaths?

Answerabout 21%

Riskier, less-traveled routes are disproportionately deadly even though almost everyone climbs the two standard routes.

Source: Alan Arnette, 'Everest by the Numbers' alanarnette.com

About how old was the youngest person to complete the Seven Summits?

Answer15 years, 5 months

Jordan Romero completed the challenge at that age in December 2011.

Source: Wikipedia (2011) en.wikipedia.org

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