Once the maintained beach trail ends, you'll have to keep walking on the shore itself. It's best to wear sturdy, closed-toe shoes and be ready for uneven, slippery footing; you'll probably find yourself walking over barnacle-covered rocks for much of the distance.
No matter how far you go, look for animals and birds both in the water and on shore. You might see sea lions or sea otters playing in the water, bears and other smaller wildlife on land, and birds of all sorts abound in the forest and on shore — sometimes in the near-shore waters too.