Walton County Coastal Dune Lake Advisory Board is hosting Coastal Dune Lake Day at Grayton Beach State Park on Saturday, Oct. 21 from 10:00 am til 2:00 pm. The community is invited to come out for a celebration of South Walton area coastal dune lakes on the shores of Western Lake in Grayton Beach. The Choctawhatchee Basin Alliance will have a booth full of information about how to protect the dune lakes, as well as a few tanks of native dune lake marine life.