* WHAT...River and urban flooding caused by excessive rainfall is possible. Landslides possible in areas of steep terrain, and debris flows possible over recently burned areas. * WHERE...Counties in Oregon: Benton, Clackamas, Clatsop, Columbia, Hood River, Lane, Lincoln, Linn, Marion, Multnomah, Polk, Tillamook, Washington, and Yamhill. Counties in Washington: Clark, Cowlitz, Pacific, Skamania, and Wahkiakum. * WHEN...From late tonight through late Thursday night. * IMPACTS...Excessive runoff may result in flooding of rivers, creeks, streams, and other low-lying and flood-prone locations. Landslides and debris flows are possible during this flood event. People, structures, and roads located below steep slopes, in canyons, and near the mouths of canyons may be at serious risk from rapidly moving landslides. * ADDITIONAL DETAILS... - A prolonged atmospheric river is expected to bring periods of heavy rain to northwest Oregon and southwest Washington Monday through Wednesday, with periods of lighter rain continuing Thursday into Friday. Rivers draining the coastal mountains and several Willamette Tributaries have the highest chance of flooding at 40 to 80%. Chances for flooding along the Willamette mainstem remains low at less than 10%. Urban flooding is possible and water on roadways will increase the risk of hydroplaning. Landslides in areas of steep terrain will be possible, as well as debris flows over recently burned areas. - http://www.weather.gov/safety/flood
The ideal streamflow range for the Alsea River is between 800 and 2000 cubic feet per second (cfs). This provides enough water for a thrilling ride while still maintaining safety for paddlers. The river is typically rated as a Class III to Class IV, with some sections reaching Class V. The segment mileage of the Alsea River run is approximately 10 miles, starting at the Blackberry Campground and ending at the Alsea Falls Recreation Site.
There are several specific rapids and obstacles along the Alsea River, including the notorious "Boulder Drop", a Class IV rapid with a large boulder in the middle of the river. Another challenging section is the "Washboard" rapid, which is a technical rapid that requires precise maneuvering to navigate safely.
There are specific regulations in place for the Alsea River area, including a permit system for commercial outfitters and a ban on alcohol and glass containers. Additionally, paddlers are required to wear personal flotation devices (PFDs) at all times while on the river. It is important to note that the Alsea River can be dangerous and should only be attempted by experienced paddlers with proper equipment and safety gear.
| Last Updated | 2025-06-28 |
| River Levels | 3 cfs (2.22 ft) |
| Percent of Normal | 32% |
| Status | |
| Class Level | iii-iv |
| Elevation | ft |
| Streamflow Discharge | cfs |
| Gauge Height | ft |
| Reporting Streamgage | USGS 14306340 |
East Fork Lobster Creek Near Alsea
|
21cfs |
Alsea River Near Tidewater
|
1190cfs |
Long Tom River At Monroe
|
92cfs |
Marys River Near Philomath
|
474cfs |
Willamette River At Corvallis
|
9790cfs |
Willamette River At Harrisburg
|
8060cfs |
| Location | Reservations | Toilets |
|---|---|---|
Salmonberry County Park Campground
|
||
Alsea Falls
|
||
Alsea Falls Recreation Site
|
||
Marys Peak Campground
|
||
Marys Peak
|
||
River Edge Group Campground
|