Aug. 22-23. The U.S. Senior Women’s Open, a USGA national championship, hosts a field of 120 of the best women players age 50 and over on the club’s 1922 Donald Ross layout. 4–7 p.m. (Sat.) & 10 a.m.–11:30 p.m. (Sun.), Barton Hills Country Club, 730 Country Club Rd. Tickets TBA at championships.usga.org.