1. Barkley Marathon
Type: Off-road
Difficulties: This is recognized as the most difficult, rigorous and unreasonable event in the world. In the past 30 years, less than 20 people have finished. Unclear match distances, unpredictable race times and quirky race directors have made the game confusing. The biggest challenge comes from the track itself. Climbing elevations of 60,000 feet (about 18,288 m), unmarked weedy sections, and 60 hours of 5 laps are an insurmountable obstacle.
The professional runner said: 3 times finisher, 2014 champion Jared Campbell said: "I didn't finish the race in 2013. The bad weather made me lose 7 or 8 hours. At Barkley, every year. Some problems will make you unable to finish."
2. Western 100 Miles Endurance Race
Type: Elite competition and high temperature
Difficulties: As the world's oldest and most famous 100-mile race in the United States, the race departs from Squaw Valley to Auburn in June each year. Runners usually endure high temperatures in California over 100°F (about 37.8°C), and for many people, they travel about 30 miles (about 48.3km) long and climb up and down the canyon during the hottest times of the day. It is the most difficult part of the game.
Professional runners said: 2 times champion Rob-Clar said: "The heat is like the devil, and it is also the most difficult part of the game. The 16-mile (about 25.75km) riverside section is bare terrain. Very desperate."
3. Hard Rock 100 Miles Endurance Race
Type: High altitude
Difficulties: Hard Rock 100 is known for its steep slopes and remoteness. In more than 100.5 miles (about 161.7 km), runners must climb 30,000 feet (about 9144m, plus the same height!). The highest point of the race was the 14,000-foot (about 4267.2 m) Handis Peak, and the average altitude of the entire race exceeded 11,000 feet (about 3352.8 m). (And only lucky enough to enter: like this year, only 145 of the 1968 applicants were selected.)
Professional runners said: Tim Olson, the record holder of the Western 100 Championships, said: "In my experience, Hard Rock 100 is significantly more difficult than the West 100. I have not completed Hard Rock in 1 day. â€
4. Ring Mont Blanc Super Cross Country (UTMB)
Type: high altitude and elite competition
Difficulties: This beautiful iconic 100 mile (about 161 km) event departs from Chamonix, France. Although there are incredible scenery and festive atmosphere along the way, you must climb over the 30,000-foot (about 9144m) super-hard terrain to see.
Professional runners said: 2 times champion and tournament record holder Lori Posio said: "The most challenging here is the climb height of more than 30,000 feet (about 9144m). And the speed of the game is very tricky, especially when you When disturbed by the atmosphere."
5. Sahara Desert Marathon
Type: distance
Difficulties: The seven-day race will pass through the Sahara Desert, which is about 150 miles (about 241.4 km). The specific route will change every year. In addition to the difficulties of pure distance, runners must also endure the hot, moving sand dunes of Morocco, as well as carry food, water, first-aid supplies and extra clothes.
The professional runner said: The United States won the first female runner in the race, and two bad water champion Lisa Smith-Bachin said: "That is a game that you find how difficult it is. The obstacles are really challenging and testing the limits of humanity. Why do you still run? Because everyone wants to know if they can only survive with their bags."
6, The Rut
Type: exposure
Difficulties: The 50K race in Montana was carried out on a high-tech, bare road with a climb height of more than 20,000 feet (about 6096 meters) of 31 miles (about 50K). This is a European-style trail running.
Professional runners said: Super horse runners and ski climbers Stevie Kramer said: "It is extremely difficult for the legs to be downhill on such technical roads. Every time I go down the mountain, I will be injured by new rocks. I was shaking when I thought about the game."
7, 135 miles of bad water super horse
Type: high temperature and distance
Difficulties: All you need to know is that you will run 135 miles (about 217.26km) in the Death Valley, which has an average temperature of more than 110°F (about 43.3°C) in July.
Professional runners said: Dean Canazes, 10 times of the water-killing finisher, said: "Even if you win the game here, there will be no good competition. The pain here is extraordinary. The temperature can be as high as 130 °F (about 54.4°C), the wind hits the face like a hair dryer."
8. Mountain Marathon
Type: Technology and exposure
Difficulties: Although the venue is in Alaska, it is in the summer season on July 4, and the sun is strong. Although the game is only 3.1-3.5 miles (about 5K-5.6km, depending on the year), it is the shortest distance in this list, but its altitude, drop and near-vertical slope make the runners complain. Every year there will be a fall here.
Professional runners said: Former US mountain runner Ricky Gates said: "There is more charm than other events, but the difficulty is the same as a 100-mile (about 161km) game."
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