Preemptively burn off a few pounds (just as you're about bound to gain some extra weight) by running through the verdant foliage of Prospect Park. If you can race to be the top of the pack at this 5K, you win a "great winter hat" as well as a pie! What more incentive does a runner need on Thanksgiving Day? Oh, you want more food? There will be a nice spread of bagels, fruit and hot chocolate waiting for you once you pass the finish line.