Accessible only at low-tide, this trail (called the North Tidal Area Trail on the Dosewallips State Park map) is a short, gravelled trail that meanders along the north end of the beach at the state park.
While this trail is quite short, and only accessible during a limited time, there are 10 total miles of trail in the state park, found across Highway 101 and departing from the camping area. If you want a longer hike, try the Steam Donkey or the Maple Valley trail.