Once you get to the car park at Newborough Warren you will see an info board on your right. Just to the right of this there is a forestry road with a locked gate to stop cars. Walk around this and carry on for about 20 minutes. It's a beautiful walk through the pine trees and dunes and you might get to see a red squirrel!!!
There is a small car park at the end (how do they get through the gate!!) keep to the right of this and walk through the dunes, skirting the forest for about another 10mins. You they come out on the beach very close to Llanddwyn Island. You can walk to the Island at low water.
It's great to walk barefoot as the paths are made of crushed shells and they feel really wierd underfoot!!