Whitewater Rafting Levels & Classifications

Class I rapids are defined by moving water with small waves that tug at the boat in a downstream flow. It's a relaxing way to spend the day. Rafting trips on Class I whitewater are generally labeled as “scenic float trips.” Most rivers have stretches of calm Class I water, creating a pleasant break between larger rapids.

Where you'll find it: Every Western River trip has many stretches of calmer water and smaller rapids. None are rated Class I only.

Class II rapids are easy to navigate, generally broad sections of water moving fast enough to create one- to three-foot whitecaps These are waves that are readily seen amidst broad channels, without needing to scout the route from the shoreline. Some maneuvering is required to keep the boat headed straight into each approaching wave.

For guests, this is typically fun, splashy whitewater that adds excitement without making the rapids the main event of the day.

Class II rapids and trips: Check out the Colorado River near Moab, Utah, with rapids like Onion Creek,  Professor Rapid, and Rocky Rapid. Raft it on our Southwest Sampler Moab Vacation Package that includes 2 days of rafting and one night on the river.

Class III rapids bring waves up to four or five feet tall that break over the bow. Currents will feel stronger, possibly channeling between brief narrow passages such as boulders or a cliff wall. Boats will shimmy and jolt with the increased punch of these larger waves, but generally the jolt is brief, with a calmer and wider recovery area below.

Plenty of excitement and fun with a guide at the helm. For many guests, Class III is a very approachable introduction to real whitewater.

Class III rapids and trips: For the best trips with Class II-III whitewater, check out Desolation Canyon; Main Salmon, Lower Salmon, and the Rogue River.

Larger waves, narrow passages, and multiple obstacles require precise maneuvering. These rapids tend to be longer, steeper, and more “technical,” which translates to turns, spins, and lateral moves across the current.

That's a meaningful step up for the person controlling the boat, but on a professionally guided trip it does not automatically mean every guest needs previous rafting experience. Many first-time guests choose a rafting trip with Class IV rapids.

Class IV rapids and trips: Experience Class IV rapids like Big Drop 2 and Big Drop 3 in Cataract Canyon, many major Grand Canyon rapids, and portions of the Middle Fork and Hells Canyon.

Another deserved level up from Class IV rapids; these look different. They are bigger and more intense. Expect powerful currents, large waves, significant drops, and major obstacles that demand expert maneuvering and precise route selection.

River knowledge, water level, and the type of boat being used all make a major difference in how Class V whitewater is approached. For example, Western's signature J-Rig raft provides a very different ride in a Class V rapid than a paddle boat or inflatable kayak. 

Class V rapids and trips: Cataract Canyon's Big Drops can reach this level at high water. Grand Canyon's largest rapids would be considered Class V, although Grand Canyon uses a separate 1-10 whitewater rating scale.

Generally considered “un-navigable” or “un-runnable” under normal circumstances, Class VI rapids are an amplified version of everything that makes Class V whitewater serious. They are rarely attempted except by expert exploratory teams under favorable conditions.

Water level matters, too. A river that is normally runnable can reach flows where commercial rafting does not operate until conditions return to an appropriate range.

A Different Rating System

The Grand Canyon's Own 1-to-10 Rapid Scale

Western River Expeditions matches the size and style of its boats to the size of the whitewater, so in many ways the experience depends as much on the raft you choose, or where you sit on that raft, as on which river you choose.

On rivers with moderate rapids, which may vary depending on water levels, we may bring along paddle boats and inflatable kayaks to let the more adventurous enjoy their thrill. At the same time, guests looking for a more relaxed ride can settle into an oar-powered raft.

When the rapids are large (higher water in Cataract Canyon and throughout Grand Canyon), we use our exclusive J-Rig raft. Sit up front for the whitewater rodeo, move to the cooler seats for a high view with a little less action, or stay farther back where things tend to “buck” a lot less.

Your guides explain where and how to hold on and what to expect before the bigger rapids arrive. You don't need to arrive knowing how to read the river.

Request a free Expedition Guide with river maps, itineraries, camping details, weather information, physical requirements, packing lists, and more. It's an easy way to compare trips and share the possibilities with everyone traveling with you.