Saturday, Sept. 6, 9 a.m.-1 p.m. – Work alongside seasoned park volunteers at the Chattahoochee River National Recreation Area repairing trails, removing non-native invasive plants, or picking up trash. Tools and training provided by park staff and fellow volunteers. Free. Park entrance fees waived. Work days at various park locations. Contact David Thomas at 678-538-1244 to find out more. Go to: www.nps.gov for details.