49 whitewater rafting terms explained, including hydraulic, weir, eddy, put-in and high side, each with a short definition.
On the river, vocabulary is safety equipment. White water rafting terminology names the features you want to hit, the ones you want to miss and the commands that get the boat from one to the other. The words related to white water rafting below run from the put-in to the take-out, and the words associated with white water rafting hazards are the ones worth learning first. The white water rafting glossary at the end has each term in a single line.
Must-Know White Water Rafting Terms, Phrases and Slang:
- Eddy
- Rapid
- Oar
- Paddle
- Portage
- Put-in
- Take-out
- Whitewater
- Bow line
- Capsize
- Current
- Downstream
- Drop
- Flood stage
- Guide
- Helm
- High side
- Hydraulic
- Life jacket
- PFD (Personal Flotation Device)
- Ripple
- Run
- Scout
- Strainer
- Swimmer
- Throw bag
- Upstream
- Water level
- Wave train
- Wet exit
White Water Rafting Glossary: Every Term A to Z
| Term | What It Means |
|---|---|
| Bow line | A rope fixed to the front of the raft, used for tying off, for lining the boat through hard sections and in rescues. |
| Capsize | The raft flipping over, tipping its passengers into the river. Recovery is drilled before the trip, not improvised during it. |
| Chute | A narrow, fast tongue of water squeezed between rocks. Often the cleanest line through a rapid. |
| Class rating | The difficulty scale for rapids, from Class I, easy moving water, to Class VI, extreme and rarely run. |
| Current | The moving water itself, varying in speed and direction across the river. Reading it is the core skill of river running. |
| Downstream | The direction the river flows, toward its mouth. Every command on the boat is given relative to it. |
| Drop | A sudden fall in the riverbed that forms a rapid or a small waterfall. Exciting to run, and often with a hydraulic at the bottom. |
| Duckie | An inflatable kayak, paddled solo or tandem. A common way for guests to run easier stretches alongside the raft. |
| Dump truck | A raft that pitches its passengers out without flipping over itself. |
| Eddy | The pocket of slow, often upstream-moving water behind a rock or bend, used for resting, regrouping and scouting. |
| Eddy line | The seam between the main current and the eddy behind it. Crossing it cleanly takes commitment and a good angle. |
| Ferry | Crossing the river sideways by angling the boat upstream and paddling, letting the current carry you across rather than down. |
| Flood stage | Water above the river's normal banks after heavy rain or snowmelt. It changes everything on the river and closes most trips. |
| Guide | The trained professional who steers the raft, calls the strokes and makes the decisions about lines and safety. |
| Helm | To steer the raft, normally the guide's job from the stern. |
| High side | The shout telling everyone to throw their weight onto the raised side of the raft when it is pinned or riding up a wall, to stop it flipping. |
| Hole | Water pouring over an obstacle and folding back on itself. Small ones are fun to surf, big ones hold boats and swimmers. |
| Hydraulic | The technical name for a hole, the recirculating current at the foot of a drop where surface water flows back upstream. |
| Keeper | A hydraulic strong enough to hold whatever falls into it rather than flushing it downstream. Avoided, not run. |
| Life jacket | The buoyancy vest every rafter wears. On commercial trips it is not optional at any point on the water. |
| Oar | A long shaft with a flat blade, worked by the guide from a frame in the middle of the raft. Unlike paddles, oars sit in oarlocks. |
| Paddle | The single-bladed shaft each rafter uses to drive and turn the boat on the guide's commands. |
| Paddle raft | A raft powered by the whole crew paddling together, with the guide steering from the back. The alternative is an oar rig. |
| PFD (personal flotation device) | The formal name for the life jacket, worn by every person on the river regardless of swimming ability. |
| Pin | A raft caught against a rock by the force of the water and held there. Getting it free takes ropes and a plan. |
| Portage | Carrying the raft and gear overland around a section that cannot be run safely. |
| Put-in | The place where the trip starts and the boats go into the water. |
| Raft | The inflatable boat the sport is built around, with several air chambers so a puncture does not sink it. |
| Rafter | Anyone paddling on the trip. Guides run the boat, rafters supply the power. |
| Rapid | A section where the gradient steepens and the water breaks into waves and holes. Rapids are what the trip is for. |
| Ripple | Small surface disturbances, usually a sign of a change in current or something just under the water. |
| Run | A continuous stretch of river with a set of rapids, scouted and chosen to fit the group's ability. |
| Scout | To stop and look at a rapid from the bank before running it, working out the line and the hazards. |
| Shuttle | Moving vehicles from the put-in to the take-out while the trip is on the water, so there is a ride back at the end. |
| Sieve | A gap between boulders that water passes through but a body cannot. Like a strainer, it is a hazard to give a wide berth. |
| Standing wave | A wave that stays in one place while the water flows through it, formed where fast water meets slower water. |
| Strainer | A fallen tree or similar obstacle that lets water through but traps boats and swimmers. One of the most serious river hazards. |
| Swimmer | Someone who has gone out of the raft into the river. The word is a call for immediate help, not a description. |
| Take-out | The place where the trip ends and the boats come off the water. |
| Throw bag | A bag of floating rope thrown to a swimmer so they can be pulled to safety. Speed and accuracy matter more than distance. |
| Tongue | The smooth V of water at the top of a rapid, marking the deepest, cleanest entry line. |
| Undercut | A rock the current flows underneath rather than around. Dangerous because water goes through where a person cannot. |
| Upstream | The direction the water is coming from, against the flow. |
| Water level | How high the river is running, which changes the difficulty of every rapid on it. Guides check it before every trip. |
| Wave train | A run of waves one after another, formed where the current pours over an obstacle. The fun part of most rapids. |
| Weir | A low man-made dam built across a river. The even wall of water pouring over it creates a wide, uniform hydraulic that recirculates, which is why weirs are treated as serious hazards rather than fun drops. |
| Wet exit | Getting yourself out from under a flipped raft or a capsized boat and swimming clear. |
| Whitewater | River water broken into foam and bubbles by gradient and obstacles. The name of the water and of the sport built on it. |
| Wrap | A raft folded around a rock by the current, wrapped tight enough that it takes rigging to pull off. |
#1 Eddy
A calm and circular moving section of water behind a boulder or river obstacle, where the current flows upstream, allowing rafters to rest, regroup or scout the river ahead without being carried downstream by the main current.
#2 Rapid
A section of the river where the gradient increases, creating turbulence and waves which provide the excitement and challenges in white water rafting. Rapids are classified by difficulty ranging from I (easy) to VI (extremely dangerous).
#3 Oar
A long pole with a flat blade on one end used by the raft guide or rower to propel and steer the raft through the water. Unlike paddles, oars are typically attached to the raft with oar locks or frames.
#4 Paddle
A tool held by rafters, with blades on one or both ends, used to propel the raft and maneuver through the water. Paddles require teamwork and coordination to effectively navigate rapids and avoid obstacles.
#5 Portage
The act of carrying the raft and gear overland to avoid dangerous obstacles that can’t be safely navigated, or to bypass sections of water that are not passable by raft, often due to low water levels or fallen debris.
#6 Put-in
The specific location along the shore where rafters launch their raft into the water at the start of their rafting trip. The put-in point is carefully chosen based on the intended river route and water conditions.
#7 Take-out
The location along a river where rafters exit the water at the end of their trip. The take-out point is strategically chosen for ease of access, safety, and minimal environmental impact, marking the conclusion of the rafting journey.
#8 Whitewater
Refers to sections of a river that have turbulent water with a lot of foam and bubbles, typically resulting from steep gradients causing rapid currents and waves. Whitewater conditions are categorized into different classes based on their difficulty and danger levels, ranging from simple, small waves (Class I) to extremely hazardous, violent waters (Class VI).
#9 Bow Line
A rope attached to the front of the raft, known as the bow, used for securing the raft to objects, for lining the raft through difficult sections, or for rescues. Essential for safety and navigation on the river.
#10 Capsize
When a raft flips over in the water, turning upside down or tipping its passengers out. Capsizing can occur in strong rapids or when hitting a rock or other obstacle incorrectly, and requires practiced recovery techniques.
#11 Current
The flow of water in a river which can vary in speed and direction. Understanding the current is crucial for navigational decisions and for anticipating the movement of the raft through rapids and around obstacles.
#12 Downstream
The direction the water is flowing in a river, moving towards the mouth of the river. Rafters need to always be aware of what lies downstream as they maneuver the raft through the waterway.
#13 Drop
A sudden descent in the riverbed, leading to a rapid or a waterfall, which can create exhilarating but challenging conditions for rafters. Drops add to the thrill but require skill to navigate safely.
#14 Flood Stage
When a river’s water level rises above its banks due to excessive rain or melting snow, significantly altering the river’s conditions. Rafting during flood stage can be particularly dangerous and often requires expert guidance.
#15 Guide
A trained professional who leads rafting expeditions, responsible for navigating the raft through river rapids and instructing participants on paddling techniques and safety procedures. Guides are crucial for ensuring the safety and enjoyment of the rafters, often making critical decisions based on river conditions and group skill levels.
#16 Helm
In rafting, to helm means to steer or control the direction of the raft, typically done by the guide or an experienced rafter. The helm position is critical for maneuvering the raft safely through challenging rapids and obstacles.
#17 High side
A command shouted by the guide instructing rafters to move to the higher side of the raft, preventing it from capsizing in uneven waters. It’s a crucial move for navigating tumultuous rapids safely.
#18 Hydraulic
A turbulent, circular current in the river, often forming at the base of a drop, where the water flows back on itself. Also known as a “hole,” it can trap objects or even rafts, making it a hazard to be avoided.
#19 Life jacket
A flotation device worn by rafters to keep them buoyant and safe in the water. It’s an essential safety gear, mandatory in whitewater rafting to prevent drowning in case of a capsize.
#20 PFD (Personal Flotation Device)
Similar to a life jacket, a PFD is designed to provide buoyancy and keep the wearer’s head above water. It’s a critical piece of safety equipment for each rafter, regardless of swimming ability.
#21 Ripple
Small waves or undulations on the water’s surface, ripples often indicate changes in current or obstructions beneath the water. They are much smaller than waves and require less navigation skill.
#22 Run
A particular section of the river that offers a continuous set of rapids. Planning a run involves carefully scouting the river conditions and choosing the most suitable path for the skill level of the group.
#23 Scout
The act of stopping to assess a section of river ahead, especially rapids or potential hazards, before continuing downriver. Scouting is often done by the guide to determine the safest and most effective route through difficult or unknown stretches of water.
#24 Strainer
A hazardous river feature where water flows through an obstacle, like fallen trees, but boaters cannot pass through, creating a trap. It’s crucial to avoid strainers to prevent entrapment and injury during a rafting trip.
#25 Swimmer
A term for someone who has unintentionally fallen out of the raft into the river. “Swimmer” signals the need for swift assistance and safety measures to help the person return to the raft or reach the shore safely.
#26 Throw Bag
A vital safety tool consisting of a bag filled with rope, which can be thrown to a swimmer in the water to pull them to safety. Quick and accurate deployment of a throw bag can save lives in rescue situations.
#27 Upstream
The direction from which the current is coming, against the flow of the river. Rafters often use the term “upstream” when referring to paddling or positioning in relation to river flow for navigation and safety.
#28 Water Level
Refers to the height of the water in the river, which can significantly affect the difficulty and navigability of rapids. Water levels are monitored to determine the best routes and safety measures for rafting expeditions.
#29 Wave Train
A series of waves following one another, formed by the current flowing over an underwater obstacle. Navigating a wave train successfully can be exhilarating, but it requires skill and coordination from all rafters.
#30 Wet Exit
A term used to describe the act of intentionally exiting a capsized raft or kayak. In whitewater rafting, knowing how to perform a wet exit safely is essential, as it involves freeing oneself from the raft and swimming to safety, usually practiced in safety drills during training sessions.
FAQ
What are weirs when rafting?
A weir is a low man-made dam built across a river, often to control the flow. Water pouring over it forms a wide, even hydraulic that recirculates back on itself, and because that backwash is uniform right across the river it can hold a boat or a swimmer. Rafting trips portage around weirs rather than run them.
What is a hydraulic in white water rafting?
A hydraulic, also called a hole, is water pouring over an obstacle and folding back upstream on itself. Small ones make good surf waves. A strong one, called a keeper, holds whatever falls into it rather than flushing it downstream.
What is the boat called in white water rafting?
A raft. It is an inflatable boat with several separate air chambers, so damage to one does not sink it. A crew-paddled boat is a paddle raft, while one rowed by the guide from a frame is an oar rig.
What do you call someone who goes rafting?
A rafter. The trained professional steering the boat and calling the strokes is the guide, and anyone who ends up in the water is a swimmer.
What do you call the spot on the river where you put in a raft?
The put-in. The place where the trip ends and the boats come out again is the take-out, and moving vehicles between the two is the shuttle.
What is a drop in white water rafting?
A sudden fall in the riverbed that creates a rapid or a small waterfall. Most drops have a hydraulic at the foot, so the line through them matters as much as the drop itself.
They divide into river features (rapid, eddy, hydraulic, wave train, tongue), hazards (strainer, sieve, undercut, weir, keeper) and gear and commands (paddle, throw bag, PFD, high side). The white water rafting glossary above covers all of them.
What are some White Water Rafting terms for beginners?
“Eddy,” “Rapid,” and “Paddle” are some White Water Rafting terms beginners should start with. They describe a resting area, turbulent water sections, and an essential tool for navigation.
What are some funny White Water Rafting terms?
“Swimmer” and “Wet exit” are some funny White Water Rafting terms, humorously referring to someone who has fallen out of the raft and the act of intentionally leaving the raft into the water.
What is a famous White Water Rafting phrase?
“High side!” is a famous White Water Rafting phrase often shouted by guides, instructing rafters to move to the side of the raft that rises highest in the water during tipping scenarios to prevent capsizing.
