Every spring, tens of thousands of alewife herring travel through the North Atlantic, into Plymouth Harbor, and swim past the Mayflower II, into Plymouth’s Town Brook, where swim two miles upstream against the current. They pass the Plimoth Grist Mill on their way to Billington Sea to spawn. Observe this wondrous migration – The Herring Run – Saturday, April 22 from 10-4.


At the Celebration you’ll gather with local scientists, community groups and other herring fans to watch thousands of fish pass through Town Brook. Learn of the importance of these fish to the ecosystem and human populations. Rub elbows with fish scientists. Help them gather data, chat with community groups and learn why they value the alewives, make alewife art, play herring games, and learn how the Plimoth Grist Mill shares the brook with these fabulous fish.