OATS Hike at Devil’s Hopyard State Park Posted on April 30, 2024 by Groton Thursday, May 23rd We take our own Thrive 55+ bus. Limited seating of 20. Located at the Eightmile River’s Chapman Falls in East Haddam, CT. It will be a 2.6 mile hike. Fee $5 per person must be paid at sign up at front desk.