Attend the special three-day NYC Marathon Health and Fitness Expo today through Saturday. It’s FREE and open to the public, whether or not you have a friend or relative running in the race on Sunday, Nov. 3. It’s your chance to visit more than 100 vendors and exhibitors from around the world for souvenirs, product samples, race applications, health and medical advice, activities, and more. See highlights of souvenir items here. The NYC Marathon Health and Fitness Expo is at the Javits Convention Center, 10-8 Thursday and Friday and 9-5 Saturday. Expo website.