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.
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.
Whirlpool Rapids Gorge—Niagara River, New YorkThe 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.
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.
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.
Class VI: Extreme and Exploratory RapidsThe 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.
Upper Tuolumne River (Cherry Creek), CaliforniaCherry 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.
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.
Lava Falls is the most famous and most formidable rapid in Grand Canyon National Park. Fabled for its steep drops and highly technical rapid layout, Lava Falls is rated as a Class 10 rapid, the highest rating a rapid can receive under the Grand Canyon's older classification system.
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.
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).