“Every spring, adults make their way from offshore waters into coastal estuaries from New England through the Carolinas. Hard-wired to advance upstream to spawn, river herring run up freshwater rivers, launching through rapids and over rocks, funneling by the thousands into smaller and smaller streams.”
This is the beginning of one of the runs from Cape Cod Bay to Great Pond and Herring Pond. You can see the Herring making their way to the smaller streams and then into the lakes to spawn. It is so amazing to watch them jump over the rapids or barriers to make their way upstream.