Andover Trails Facilitates use of the trail systems in the town of Andover Massachusetts, including recreational use of the Shawsheen River. Website Current Events Upcoming Events Past Events There are currently no events. There are currently no events. 18 Apr 18 Apr - 05 Jun Shawsheen River volunteer river herring count 2022-04-18 @ 06:00 (GMT+0000) - 2022-06-05 @ 19:00 (GMT+0000) 15 Stevens Street, Andover, MA, USA Participatory science event