Petrified Park Campground Highway 12 Lemmon, SD 57638 Lemmon, SD Campgrounds Petrified Wood Park Museum 500 Main Street Lemmon, SD 57638 Lemmon, SD Museums Grand River Museum 114 10th Street W Lemmon, SD 57638 Lemmon, SD Museums Llewellyn Johns Memorial Recreation Area Rural Lemmon, SD 57638 Lemmon, SD Recreation Areas