What is a Class 4 river?

Class IV: Advanced. Intense, powerful but predictable rapids requiring precise boat handling in turbulent water. Depending on the character of the river, it may feature large, unavoidable waves and holes or constricted passages demanding fast maneuvers under pressure.



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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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While most people can raft Class 4 rapids for their first time, there are several requirements. The minimum age to raft Class 4 rivers, depending on the river and company, is 12-14 years old. Many Class 4s recommend that you are in good physical condition, on the adventurous side, and know how to swim.

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Class VI: Extreme and Exploratory Rapids The consequences of errors are very severe and rescue may be impossible. Only teams of rapids' experts should attempt these rapids at favorable water levels, after close personal inspection and taking all precautions.

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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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The Falls themselves and the immediate area below are certainly a Class VI: unrunnable. The navigable portions of the Upper Great Gorge (below the Falls, where the Maid of the Mist boats run) are roughly a Class IV.

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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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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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Class 3 is a typical beginner level for rafting. Class 4 is intermediate to advanced and good for adventure rafters. Class 5 is advanced and recommended only for experienced rafters. Class 6 is unrunnable by most people and presents an extreme level of danger.

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Upper Tuolumne River (Cherry Creek), California Cherry Creek is the gold standard for Class V and is the hardest section of commercially rafted whitewater in the United States. Rapids like Mushroom (V), Toadstool (V), and Lewis's Leap (V) challenge even the most experienced river guides.

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