Upstream will host a Fish March and Clean-up on Cobbossee Stream from 10 a.m. to noon on World Fish Migration Day and Earth Day, Saturday, April 21, in downtown Gardiner.

Participants should meet on the bridge on Bridge Street and help spread the news about the return of the annual run of alewives on Cobbossee Stream and pick up the trash along the banks to keep the stream clean.

Upstream is a local non-profit working to restore fish passage and ecological health to Cobbossee Stream.

For more information, contact Tina Wood at 582-0213 or rtwood1@ymail.com.