"Ruins to Rapids" Almost Full Moon Hike This event has already occurred.   (Archived) This 1.5 mile ranger-led hike is rated "moderate" and follows the lovely rapids of Sweetwater Creek to the Civil War-era mill ruins of New Manchester where we will tour inside the mill. Hikes will continue if it is overcast but will be cancelled if it is raining. A flashlight and sturdy, closed-toe shoes are required. No children under 6 or dogs allowed. $6 plus $5 parking. 770-732-5871. Sweetwater Creek State Park