Tag: paddling

An upwelling of water on the river's surface, caused by deep current hitting a submerged obstacle and being forced upward. Boils appear as smooth, rounded swells that rise and collapse, as if the river is breathing from below. Large boils in big water can destabilize boats.

 A kayaking maneuver in which the paddler launches off the lip of a drop and lands flat, keeping the bow above the surface to avoid being driven underwater by the falling water. Also used as a noun for the rock or feature used to launch the move. A good boof is one of the most satisfying things in whitewater — a clean, dry, controlled flight.

A section of river choked with large boulders, creating a maze of channels, drops, eddies, and hydraulics. Running a boulder garden requires constant maneuvering — reading the gaps, choosing lines in real time, threading between rocks with inches to spare.

The boundary between the downstream current and the upstream-flowing water of an eddy. A seam of turbulence where two opposed flows meet. Crossing it requires commitment — hesitate on the eddy line and the river will make decisions for you.

The act of crossing a river's current without being carried downstream, by angling the boat into the current and paddling against it. The boat moves laterally across the flow like a ferry on a cable. A forward ferry faces upstream; a back ferry faces downstream. The ferry is one of the foundational skills in moving water — it means you can go where you want, not where the river wants.

Deep, fast, unobstructed river flow — the dark, smooth water between obstacles. Green water is free of air bubbles and turbulence. It's the water you want to be in.

A large, steep standing wave caused by the rapid deceleration of fast-moving current. Bigger and more chaotic than the waves in a wave train — a haystack erupts and collapses and reforms, its crest tumbling and rebuilding.

A river feature where water pours over a submerged rock or ledge, drops, and recirculates back upstream, creating a churning, foamy pocket. Small holes are playgrounds for kayakers who surf them for sport. Large holes can flip rafts and hold swimmers underwater. Also called a hydraulic.

The point on a river where the water surface disappears from view, indicating a sudden drop in gradient ahead — a rapid, a falls, or a ledge. When you see a horizon line, you stop and scout. The river is hiding something.

 A recirculating current formed when water flows over a ledge or dam and curls back on itself, trapping anything caught in the cycle. The most dangerous are "keeper" hydraulics — uniform, river-wide features with no escape route. Low-head dams create the deadliest hydraulics because they look benign from upstream.

A hydraulic powerful enough to hold and recirculate a swimmer or boat indefinitely — the recirculating current strong enough that the water pouring in at the upstream end overpowers any attempt to escape. Keeper holes form below ledges, low-head dams, and pourover drops where the hydraulic is uniform across its width, offering no corner or edge to wash out of. Low-head dams are the most lethal keepers because they look harmless from upstream. A keeper is the river's trap, and it is patient.

A mound of water that builds up on the upstream face of a large boulder or cliff where the current hits it head-on. The water rises, swells, and deflects — a pillow will push a boat away from the obstacle rather than into it, which makes it one of the friendlier river features despite looking intimidating.

 The act of carrying a boat and gear overland between two navigable bodies of water, or around an obstacle in a river — a waterfall, a dam, an impassable rapid. Also the trail used for this carrying. Portage routes were the original highways of the North American interior, and many modern roads follow them.

 A river feature where a thin sheet of water flows over the top of a barely submerged rock, creating a steep drop on the downstream side often followed by a hydraulic. Pourovers are generally avoided — they're steep, abrupt, and the hydraulics below them can be powerful.

The visible boundary where fast current meets slow current — a line on the water's surface where two different speeds of flow run side by side. Fish position themselves on the slow side of a seam and dart into the fast side to intercept food. For anglers, seams are the most consistently productive water on any river.

 A gap between rocks or boulders through which water flows but through which a boat or person cannot pass. Similar to a strainer but formed by the geology itself rather than by debris. The river goes through; you don't.

Any obstacle in the river that allows water to pass through but traps solid objects — fallen trees, root wads, log jams, fences, bridge debris. Water flows through; boats and bodies do not. One of the most dangerous features in moving water because the current pins you against the obstacle with relentless force.

The smooth, dark, V-shaped slick of water at the top of a rapid where the current accelerates and funnels between obstacles. The tongue is the entry point — the river showing you where it wants you to go. Its surface is glassy and free of air bubbles because the water is moving too fast to be disturbed.

An open boat made of walrus or bearded seal skin stretched over a driftwood frame, roughly thirty feet long — traditionally called a women's boat because women built and often commanded it. The umiak carried families, dogs, and entire households along Arctic coastlines for thousands of years.

A series of standing waves formed where fast current hits slower water or a change in gradient, creating a rhythmic sequence of peaks and troughs that a raft or kayak rides through like a roller coaster. The most purely fun feature in whitewater — predictable, exhilarating, and usually safe.

Turbulent water aerated by its passage over rocks, drops, and constrictions, giving it a white, foamy appearance. The white is air — millions of tiny bubbles mixed into the flow. Whitewater is simultaneously the obstacle and the attraction, the thing that makes the river dangerous and the thing that brings people to it.