Check the USGS Hoh gauge and look for flows of around 5000 cfs. Historically there was a gauge on South Fork Hoh (stn. 12040900, 1985-1989, 50 sq. mi.) but it's no longer active. Discharge on the South Fork is approximately 20% of the flow recorded on the Hoh River gauge. Be careful of high water as this river transports massive trees as the river approaches flood.