The beaches of Lincoln Park (and elsewhere around King County) are closed for shellfish due to a marine biotoxin.
The beach at Lincoln Park has been closed now for about ten days due to marine biotin which means you cannot dig for shellfish there.
The beaches are closed for clams, geoduck, scallops, mussels, oysters, snails and other invertebrates.
A sign posted at the north end of the park states, "Shellfish in this area are unsafe to eat due to biotoxins paralytic shellfish poisoning (PSP) and/or amnesic shellfish poisoning (ASP).
You can learn more about it and keep in touch with the issue on the shellfish page for the State of Washington here.
You can also call the biotoxin hotline at 1-800-562-5632