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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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.
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.
The 31.5-mile section of the river between Hells Canyon Dam and Upper Pittsburg Landing is designated as the Wild river section. Rapids vary from Class II to Class V.
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.
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.
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.
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.
Located near North Carolina's southern boundary, the Green River (a French Broad tributary) is 60 miles long. It's highly regarded for whitewater sports, with great runs for novices (Class II-III) and experienced rafters (Class V).
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.
Great Falls of the Potomac River is a major set of rapids located about 15 miles upstream of Washington, DC. The main Falls lines drop fifty feet in one-tenth of a mile, creating a Class V+ set of waterfalls.
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.
Yarlung Zangbo River Grand Canyon in China's Tibet is known as the world's deepest canyon. The 504-km-long grand canyon starts in Mainling County and ends in Medog County.
The Truckee River is 7 miles long between the Boca reservoir raft put in and the Floriston take out. There are mainly Class II rapids with a mile of several Class III rapids in the last mile including Bronco and Jaws rapid.
Class 10 rapids are similar to class IV+ rapids on the international system. While the rapids are what brings many people to raft the Colorado River the majority of the river is actually flatwater. Overall the gradient of the river is only 8 feet per mile but most of the drop comes in the big rapids.
Compared to the Numbers, the rapids in Browns Canyon are predominantly Class II / III with one class IV during certain water flows, you won't get anything as large or as fast as those on The Numbers. During the run, there are plenty of swimming holes where you can take a breather.