If you have some extra time google edgerton park or eli whitney museum. They are across the street from one another and both would make a great pit stop for the pup, and yourself.

Edgerton park is a massive rich guys old property which got made into a park really cool to check out (alot of people go off leash here)

Eli whitney museum has great trails along a river at the bottom of east rock, short medium and longer loops.

Enjoy NHV