Southampton - Co-founders of the Hamptons Marathon, Amanda Moszkowski and Diane Weinberger, recently donated $20,000 raised through their third annual event to Southampton Hospital. The funds will be used for a renovation of the Cardiac Rehabilitation Department. The event, which is held annually in East Hampton, attracted more than 1,300 participants for the 26.2-mile run. Next year's event will be held on October 2. Registration information can be found at www.hamptonsmarathon.com.