Hazard Warning: Hazard information may be user-submitted and unverified. Conditions change frequently. Always scout rapids and obstacles yourself.
Portage WA

Lower Granite Dam

Snake - L) Lewiston to Columbia River (WA)

Monitor this Rapid
Gauge Conditions
Asotin Creek at Asotin, WA Upstream Primary
Runnable: ? – ? CFS

Approximate - nearest available gauge. Use as general reference only.

Data from American Whitewater & USGS
Photo
Lower Granite Dam
Photo courtesy of American Whitewater
Description
Lower Granite Dam is a mandatory portage due to the hydroelectric dam structure, requiring boaters to completely exit the river and transport their watercraft around the obstacle. The dam eliminates any paddling opportunity through this section and represents a significant navigational challenge for river travelers, necessitating careful planning and logistical preparation for safe passage.
Location
Type
Portage
Mile Marker
31.6 mi
Directions
Navigate
View Full Run
L) Lewiston to Columbia River
Snake
I 140.0 mi
Portage recommended — Scout before running and consider carrying around this feature.
Current Conditions
5-Day Forecast
Whitewater data from
American Whitewater