The invention provides an improved water flume ride having one or more slide effects for presenting multiple random flume paths to riders. In one embodiment, a water flume comprises a primary flume portion, an uphill embankment culminating in a crest, and two or more adjoining secondary flume portions. The secondary flume portions provide mutually exclusive ride paths which are selected according to the particular kinetic energy and/or momentum possessed by a rider ascending toward the crest of the uphill embankment.