Hopeville Pond State Park Trail is a standout hiking destination in Griswold, Connecticut, covering 4.0 miles with 200ft of elevation change. Stats: 4.0 miles, 200ft gain, Easy. Type: Loop. Surface: Dirt. Time: 2 hours. Fee: $15 parking. Dogs: Yes. Permit: No. Wildlife: deer, herons, painted turtles, foxes. Best seasons: Eastern Connecticut pond and woodland trail. Pack water, layers, and appropriate footwear. Conditions vary across Connecticut. Leave No Trace: stay on trail, pack out all waste, respect wildlife.