Lace up for a speedy 5K adventure through the heart of Cambridge, MA, where you'll cruise down Mass Ave on a nice, flat course that's perfect for hitting a personal best. Whether you're going all-out or enjoying a leisurely autumn run, you'll start and finish in the lovely downtown area and still have plenty of time to celebrate at the post-race festivities! Spots fill up quickly, so grab yours soon—prices start at just $40 if you register before July 19th, then gradually increase closer to race day.