I'm sorry for any confusion, but there appears to be some misunderstanding regarding the location and details about Martins Beach. Martins Beach is not located in Willingboro, United States; instead, it's known to be in California, near Half Moon Bay, and has been the subject of property rights and public access debates. There seems to be a mix-up in the details provided in your request. Therefore, I'll be unable to construct a description based on the specifics you've given, as they do not accurately correspond to Martins Beach's known characteristics and location.