at Ha Ha Tonka State Park
Access the park from the Lake of the Ozarks within the Big Niangua arm at the 14-½ mile marker. There are docks on both the castle ruins and spring side of the cove. The boat length limit for docking at the park is 24 feet. There are no fees. On the spring side of the cove near Lake Shelter, the park provides an area with large stone steps designed for launching kayaks. From this location, floaters can paddle the 13.3-mile-long Big Niangua River Trail up the river toward Tunnel Dam and Lake Niangua.