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Outdoors · Guess the stat

How well do you know mountain summits?

Guess the real numbers behind mountain summits, see how everyone else guessed, and get the source.

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

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Majestic winter view of snow-covered Mount Everest under a clear blue sky, captured from Khumjung, Nepal.
Photo: Dick Hoskins / Pexels
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Today's round

  • 4 stats to guess
  • 1 opinion poll
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Guess, see the crowd, get the real number. One ranked attempt per day.

Summit by the numbers

Real figures with their sources. All Summit facts →

about 7,563

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

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

about 43%

What's the overall success rate for climbers who attempt to summit Everest above base camp?

Success is measured as summits divided by attempts made above base camp, across all expeditions tracked.

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

15 years, 5 months

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

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

Source: Wikipedia (2011) en.wikipedia.org

What people think about mountain summits, especially Mount Everest

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Would you ever want to climb Mount Everest?

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Which of the Seven Summits would you most want to attempt?

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What's the biggest challenge in summiting a big mountain?

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Questions

How does SummitSurvey.com work?

Each question asks you to guess a real number about mountain summits, especially Mount Everest. After you answer you see how everyone else guessed, then the real figure and where it comes from.

How is the daily round scored?

Four stats and one opinion poll. A correct guess earns 100 points plus up to 50 for speed, with a combo bonus for answers in a row. The range next to the right answer earns 40. Opinion polls earn 25 for having your say, and nailing every stat adds 150.

Where do the numbers come from?

Every stat links to its source, such as government statistics agencies, research organizations and industry groups. Figures are checked against the source before they go live.

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