Friday, August 30th- OATS (Outdoor Active Traveling Seniors)- Harkness State Park in Waterford for a Walk Posted on July 26, 2019 by Groton Time: 8:30am OATS a 55+ Outdoor Active Traveling Seniors group. Interested? Call 441-6623 or email colsen@groton-ct-gov Each event requires registration please call 860-441-6623.