Although you can map the GPS coordinates, there is no precise address for the park entrance. From the ferry dock, take Yoman Road south, then when it turns into Eckenstam - Johnson Road (keep left at the Y-intersection) continue south. It's about 2.7-3.2 miles from the dock, depending on how you map it, with the trailhead and small parking lot with signage on the left.
Anderson Island is worth a trip just to visit this pretty little trail. It begins by winding through a marsh on a boardwalk, then proceeds through open woods to the chimney and the site of the Jacob family pioneer family. From there, the trail leads to a clean, waterless composting pit toilet. and to some cutbanks overlooking the south side of Oro Bay. At low tide you can explore the kelp-y, pebbly beaches. I heard tell of a sea cave (also mentioned on park websites), but I did not see it for myself. I did however see the sea.
The website also warns of being trapped by "sucking mud" and the tides. Certainly, when the tides are coming it, be sure to know where you got down to the beach and keep it in sight, as the banks are steep all around and access points are limited.
Even if the tide is in, the end of the point features a stunning view of Mt. Rainier, shining bright, or reflecting brightly, rather.
The trail is mostly level with a few bumps, well maintained, and easy to follow. read more