Here's a google link of Marina Del rey
http://maps.google.com/maps?f=q&hl=e...,0.059395&om=1
The beach path from Santa Monica ends and turns inland at Washington to get around the Marina. The path around the Marina picks up between Oxford and Admiralty way it's pretty obvious. It'll dump you on Fiji way. At Fiji way, the path picks up again where it ends in that circle. Just head towards the ocean, cross the bridge and your on your way. Eventually you'll want to get on Catalina which will take you right into Palos Verdes.