N. Oregon Coast Razor Clamming to Remain Closed Through September Published 07/06/21 at 7:25 PM PDT By Oregon Coast Beach Connection staff (Seaside, Oregon) – The north Oregon coast's annual conservation closure for razor clams begins soon, yet no one will really know the difference: razor clamming there has been closed for almost a year. This means the area around Seaside and Warrenton (Clatsop Beach) will remain closed to the activity at least through September 30. Latest Coastal Lodging News AlertsIn Seaside: Includes exclusive listings; major specials now that spring is here Reedsport to Brookings, places to stay; winter deals Clatsop Beach means from Tillamook Head in Seaside to the mouth of the Columbia River. The area has been shut down for razor clams since October of last year because of the biotoxin domoic acid, which have been at unsafe levels all year.