For the biggest clams, Ayres recommends arriving at the beach about an hour before low tides. Evening low tide will be -0.4 feet at 5:39 p.m. Nov. 20 and -0.7 feet at 6:17 p.m. Nov. 21.

Twin Harbors Beach extends from the mouth of Willapa Bay north to the south jetty at the mouth of Grays Harbor and includes Westport, Grayland and North Cove.  Long Beach extends from the Columbia River to Leadbetter Point.

All diggers age 15 or older must have an applicable 2010-11 fishing license to harvest razor clams on any beach. Licenses, ranging from a three-day razor clam license to an annual combination fishing license, are available on WDFW’s website at   and from license vendors around the state.