Start at Cadman Plaza Park by the base of the Brooklyn Bridge (take the A/C train to "High Street"). You can loop the park a couple of times (0.4 miles on the outside) for a warmup, and then head take Middagh St. all the way to the end, where you can connect to the Brooklyn Heights Promenade. Take the Promenade all the way down and exit at Remsen St. Take Remsen and make a right on Hicks St. Enjoy the beautiful architecture and quiet streets of Brooklyn Heights down to Atlantic Ave. Turn left on Atlantic and go one block over to Henry St. Turn left on Henry and retrace your steps directly back to Cadman Plaza.