All the way up stream. If you keep to the right side you will pass the narrows, pass shipwreck rock on your left then enter the other wide ope part of Saguaro stay to you right . when you pass the back docks your almost there. Pass the no wake buoys, slowly . The no wake zone is like a mile long to get there. Can be well worth the trip. If you get there late, you wont get a spot. The beach has been under water last few times I was there.