Young and old, singles and families . . . all are welcome to join CAMBA’s fundraising 5k and 10k run in Prospect Park on Sun., May 3, starting at the Peristyle, 96 Parkside Ave., Brooklyn. The 10k race starts at 8:30 am; the 5k run/walk starts at 8:45 am. Register online at camba.org or on-site at 7:30 am. $30 thru April 26; $40 on April 27 thru May 3.