Hundreds of volunteers are expected for the 21st annual North Fulton Rivers Alive cleanup from 8-11 a.m. Sept. 24 at Riverside Park, 575 Riverside Drive, Roswell. Volunteers will help remove litter and debris from the Chattahoochee River and surrounding areas in Roswell and Alpharetta.

Registration begins at the park at 8 a.m. Participants can walk, drive or canoe to selected locations. Recognition from elected city officials will be followed by a cookout for volunteers.

Those under age 18 must have a waiver form signed by a parent.