Class IVCascade Foothills, WA
Skykomish River — Boulder Drop
3,160 CFS→
Low OptimalAbout this run
The Sky is the heartbeat of Washington paddling. The Index to Goldbar stretch — known as Boulder Drop — is the state's most iconic Class IV run, a relentless series of powerful hydraulics, boulder sieves, and swift Class III connectors set against the backdrop of the Cascades. It's big Pacific Northwest water: high volume, fast moving, and unforgiving when flows are up. The Sunset Falls section adds Class V for those looking to push it, while Boulder Drop itself is a rite of passage for serious Northwest paddlers.
Known Hazards
- Boulder Drop Rapid — Class IV+ at higher flows, multiple lines
- Sunset Falls — Class V mandatory portage for most paddlers
- High volume means fast swims with few eddies to self-rescue
- Rainfall spikes flows rapidly — always check gauge before driving out
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Post a TripCurrent Flow
3,160CFS→
stable
Too LowOptimal RangeHigh
Current3,160 CFS
Optimal Min2,000 CFS
Optimal Max7,000 CFS
StatusLow Optimal
Water Temp11.2°C / 52°F
7-Day Flow
05/232,720 CFS05/28
River Info
RegionCascade Foothills
StateWA
DifficultyClass IV
USGS Gauge12134500
RunnableYes