sentences:  In addition, the canoes and kayaks give the paddler improved performance and maneuverability needed to avoid river obstacles.Creeking usually involves the descent of waterfalls and slides, but equally applies to any steep low volume river.Creek characteristics can vary greatly, from very smooth granite like Cherry Creek in California where there are no loose rocks and most features are slides and waterfalls, to boulder gardens such as the Stein River in British Columbia where rapids are formed between rocks with features including sieves (siphons), step drops, holes, and undercuts.