Hal Goforth, Jr.'s story isn't something you hear everyday. The 67-year-old who splits his time between California and Florida isn't your average runner. He is an extraordinary one. Having run 36 Boston Marathons, eleven B.A.A. Half Marathons, and this year's B.A.A. 5K, Goforth will be competing in his first B.A.A. 10K on Sunday. Entered in the inaugural B.A.A. Distance Medley, Goforth's story on how he first discovered running -- and the Boston Athletic Association -- is special.