This web site has been around for a while but they recently added some cool features.
They now have the GPS coordinates listed for each beach and a link to an aerial picture of the beach. I’ve often wanted to try clamming on some of these beaches but feared a gun totting land owner might ruin my day, with the GPS coordinates I can land with confidence. I’ve been slowly adding all the coordinates into a text file and then downloading them into my Lowrance…cool stuff!

http://ww4.doh.wa.gov/scripts/esrimap.dll?name=bioview&Cmd=Map&Step=1


You have to follow the 3 steps to get to the specific info for a beach:

Step 1
Select a county on the map

Step 2
Select a water body on the map

Step 3
Select a beach on the map

Hope this is useful...
Crabin