Old Kings Trail is a hiking and biking trail in Truro, Massachusetts. It is within Cape Cod National Seashore. It is 1.9 miles long and begins at 6 feet altitude. Traveling the entire trail is 3.8 miles with a total elevation gain of 93 feet. Near the trailhead there is a parking. The Salt Meadow (elevation 3 feet) wetland can be seen along the trail. There are also viewpoints, wetlands, parking, and a wetland along the trail.