It stretches between the Ritz-Carlton and the Marriott Courtyard at the end of Isla Verde near the airport .
Read more: http://www.frommers.com/destinations/puerto-rico/744365#ixzz2l1ZBodrj
Follow Route 3 to Route 760, and travel south until you run out of road and reach the lighthouse. From here, there's a trail that takes you to the beach.