You can see the crosshairs to the left in this picture. turn in on marina, once it turns to dirt continue a little ways (1/4-1/2 mile) then when it hits a smaller 50-70ft soft dirt hill (cant miss it really) go right, its really the first real "path/road that you come to on teh RIGHT. If you go left anywhere and then hit a wash, you've gone just a tad to far and go back or cut right after or over the hill. Follow that dirt trail/road back to the spot.
Just thought I would add a picture to the words, Billy.