Recreation Report: Northwest Zone: Fishing - Oregon Department of Fish and Wildlife:

Northwest Zone: FISHING
Most Mid-Coast Rivers are open for salmon, steelhead and cutthroat trout fishing. Anglers are encouraged to consult the regulations prior to fishing a particular river.
ALSEA RIVER: Cutthroat trout fishing is open and there are plenty of resident trout to be caught. The Sea run cutthroat trout (Blue Backs) typically start returning in mid July with good number s by September. Steelhead angling is open but very slow during the spring and summer. Steelhead fishing typically picks up starting in September through the winter months. Only fin clipped steelhead may be harvested. During high flows, anglers should concentrate on upper river and headwater areas first as river conditions improve more rapidly. Current river levels and forecasts can be found at http://www.nwrfc.noaa.gov/river/station/flowplot/flowplot.cgi?TIDO3."