The first chinook arrive in the bay off Florence by August, and eager anglers will pick up some then and in the first days of September. Larger numbers of fish and fishermen come in mid-September, and fishing holds up well through October and can be quite productive even into early November. Bay anglers can launch right in Florence, and upriver you'll also find public launches in at Cushman, Tiernan and Mapleton.
Trolling with bait or spinners is popular here, with plenty of room to fish in the long bay and tidewater. Bobber and bait fishing is usually done higher in the tidewater section, including above the ramp at Mapleton.
Bright chinook will move above tidewater when rains are heavy enough to give the Siuslaw River level a nice bump, often starting in late September or early October and holding up through November.
Above tidewater, chinook fishing is best in the lower river, especially below the confluence of Lake Creek at Swisshome, where there is bank access and boat launching.
The half dozen or so miles of free-flowing river from Swisshome down to tidewater offers a couple more public launches and additional bank fishing access at pull-outs along Highway 36.
For current regulations, consult the Oregon Department of Fish and Wildlife's annual regulations booklet or website.