Canton is holding its second annual Senior Olympics at the Massachusetts Hospital School on Sept. 20 and 21. Events include golf, track, basketball, bowling, and ballroom-style dancing. The competition is open to Canton residents age 50 and up. The registration fee is $10, which includes lunch and a T-shirt. Registration forms are due by Sept. 13 at the Council on Aging office at 660 Washington St. For more information, contact the Canton Council on Aging at 781-828-1323 or Canton Recreation at 781-821-5030.