Might be a little out of your drive time, but consider these!

The Closer to Free Ride is one of my all-time favorites. It benefits the Smilow Cancer Center at Yale Hospital and has some beautiful views and awesome food.
Closer to Free Ride

While the Tour De Lyme isn't a Century Ride, it's one of the most beautiful rides I have ever been on. It's hilly, challenging and the views are spectacular. The countryside you'll see will take your breath away.
Tour De Lyme