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

Lower Monumental 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 Monumental Dam
Photo courtesy of American Whitewater
Description
Lower Monumental Dam is a mandatory portage due to the hydroelectric dam infrastructure, requiring paddlers to completely exit the river and carry their watercraft around the obstruction. The portage involves navigating steep, potentially slippery concrete surfaces and can be challenging with heavy gear, so careful planning and teamwork are essential for safe passage.
Location
Type
Portage
Mile Marker
97.3 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