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playspot

n. Part of a river where playboating is performed.

Wikipedia
Playspot

In kayaking, a playspot is a place where there are favorable stationary features on rivers, in particular standing waves (which may be breaking or partially breaking), 'holes' and 'stoppers', where water flows back on itself creating a retentive feature (these are often formed at the bottom of small drops or weirs), or eddy lines (the boundary between slow moving water at the rivers' edge, and faster water).

Playspots exist both in natural and artificial whitewater.