This is a rainy season run that typically requires a few days of solid rainfall to reach runnable flows. The river begins as a class II section as it meanders through the small town of Preston. The Raging is prone to wood accumulation, and while most hazards can be seen and avoided, paddlers should expect to get out and portage in places. About halfway through the run, the river swings close to the road and drops into the class III+ 'Cheesegrater,' a boulder-strewn rapid with powerful holes. It then passes under the Preston–Fall City Road and enters a dark-walled canyon, where another class III rapid turns sharply away from the road. From there, the river gradually eases before reaching its confluence with the Snoqualmie at Fall City. Due to frequent wood hazards, scouting is strongly recommended before running.
Additional Information: A Guide to Whitewater Rivers of WA, J. Bennett (1990)