What is the most difficult rapids in the US?

Cherry Creek—Upper Tuolumne, California Narrow, steep and boulder-ridden, this run is certainly one of the toughest sections of whitewater out there. A whopping 15 Class V rapids punish paddlers from mid-summer to September, because the high flows of spring make Cherry Creek too dangerous.



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Rafting trips are broken down into different classes, using the International Scale of River Difficulty (ISRD) rating system. These begin with Class I (less difficult) to Class VI (most difficult) and consider the elements of the river and the skill level needed to raft it.

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The Most Dangerous Rapids In The World
  • Upper Yough River, Maryland. ...
  • Lochsa River, Idaho. ...
  • Godzilla – Rio Upano River, Ecuador. ...
  • Section 4—Chattooga River, Georgia and South Carolina. ...
  • God's House – Karnali River, Nepal. ...
  • Little White Salmon, Washington. ...
  • Santo Domingo River, Chiapas, Mexico. ...
  • White Nile, Uganda. Shutterstock.


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Whirlpool Rapids Gorge—Niagara River, New York The Niagara Gorge is a deadly section of exploratory rapids. As the water travels through, it reaches about 30 mph, creating the Class 6 Whirlpool Rapids, some of the most extreme in the entire world.

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Feel the thrill of being at the river's edge! White Water Walk offers a first-hand lesson in the raw power and peril of the Niagara River's Class 6 whitewater rapids, some of the wildest in North America.

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Cherry Creek—Upper Tuolumne, California A whopping 15 Class V rapids punish paddlers from mid-summer to September, because the high flows of spring make Cherry Creek too dangerous. Be prepared for drops, undercurrents and lots of boulders on this tough and technical section.

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The Yellowstone River is classified as Class II-III rapids from Yellowstone National Park to Paradise Valley (the first 18 miles of legally navigable whitewater on the Yellowstone River).

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The Class 1-10 system that is used in the Grand Canyon roughly parallels Classes I-V on the International Scale of River Difficulty (ISRD).

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Grand Canyon rapids are rated on a 1-10 scale. Flat water is 1 while tough rapids like Lava Falls or Crystal can be rated 10 at certain water levels. A 10 rating in the canyon is roughly equivalent to a Class V in the standard river scale.

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Class I Rapids: These are gentle, smooth-flowing sections of the river with minimal obstacles. These are the go-to for river rafting for beginners, as the rapids feature small waves and few obstructions.

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The Best Whitewater Rafting Destinations in the U.S.
  • Ocoee River: Tennessee.
  • Colorado River: Arizona.
  • Snake River: Wyoming.
  • Gauley River: West Virginia.
  • Kennebec River: Maine.
  • Arkansas River: Colorado.
  • Rogue River: Oregon.
  • Salmon River: Idaho.


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The highest level is class VI. Most of these rapids have never been attempted. They are extremely difficult, unpredictable and dangerous. All precautions have to be taken at favorable water levels because the consequence of error is very severe and rescue may be impossible.

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Class IV Rapids - Whitewater with Obstacles and More Technical Skills » Larger waves, narrow passages, and multiple obstacles to avoid requiring precise maneuvering to avoid upset.

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These rapids are often best saved for those who have rafted before, but that doesn't necessarily rule out the first-time adventure-seekers. If you're in great shape and ready for a physical and mental challenge, you may be ready for Class IV rapids rafting trip on your first river expedition.

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The Grand Canyon is rated Class IV with few Class V rapids and numerous Class I – III rapids as well.

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William J. Kendall, a policeman from Boston Mass. swam the Whirlpool Rapids on August 22, 1886. He wore only his swimming trunks and a cork life preserver.

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The Grand Canyon stretch of the Colorado River often uses a different rating system. The Class 1-10 system that is used in the Grand Canyon roughly parallels Classes I-V on the International Scale of River Difficulty (ISRD).

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Santo Domingo River, Chiapas, Mexico Rio Santo Domingo is known as the steepest kayakable river in the world. Oregon Kayaking defines rafting there as the Holy Grail of big-drop steep creeking.See why in this video.

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