Think you’re tough? Try these 5 epic feats of human endurance

Climbing Mount Everest
Scaling the world’s highest peak at 29,032 feet is a monumental challenge, not because Everest is so steep but for the extreme conditions humans must endure to scale it. With temperatures dropping below -30°C and oxygen levels reduced by 66 percent at the summit, climbers face severe weather, altitude sickness, and exhaustion. In 1953, Sir Edmund Hillary and Tenzing Norgay were the first to conquer Everest—a feat only about 6,000 people have managed since. As of 2023, around 200 climbers have successfully summitted Everest without oxygen.

Crossing the Sahara Desert on Foot
The Sahara is unforgiving. With scorching daytime temperatures of 120°F and nighttime chills, plus limited water sources, crossing this 3.6-million-square-mile desert on foot is no small feat. Many have attempted the challenge, but few are as legendary as Ranulph Fiennes and Charles Burton, who took three months to cross the Sahara as part of their 1979 expedition from the North to the South Pole. .

Swimming the English Channel
At first glance, it’s “just” 21 miles, but swimming from England to France is one of the world’s hardest endurance challenges. Besides frigid water (averaging 60°F) and strong tides, swimmers have to deal with jellyfish, hypothermia, and sheer fatigue. The first recorded successful crossing was by Matthew Webb in 1875, who completed it in nearly 22 hours. It’s a swim that tests mind, body, and spirit.

Running Ultra Marathons
Running a 26.2-mile marathon is tough—but try running 100 miles nonstop. Ultra marathons push athletes beyond human limits, combining sheer distance with brutal terrains, from mountains to deserts. One of the hardest is the Badwater Ultra, a 135-mile race through Death Valley with temperatures reaching 120°F. Ultra runners like Scott Jurek have become legends in the sport, proving that extreme endurance is as mental as it is physical.

Crossing the Atlantic in a Rowboat
Crossing the Atlantic by boat sounds hard enough—but doing it in a rowboat? That’s a challenge for the truly determined. In 1896, George Harbo and Frank Samuelsen were the first to row from New York to England, covering 3,000 miles in 55 days. Battling waves, unpredictable weather, and total exhaustion, the duo proved that determination can conquer any ocean.