The fifth year of the Georgetown Bridge2Bridge Half Marathon is back, and will also feature a 12K and 5K. Enjoy a run through the beautiful historic town. This year’s charity will be Friendship Place, which works to provide people opportunities to overcome crisis and work toward being self-sufficient. Georgetown Clock Tower, Front and Screven streets. Saturday, 7:30 a.m. $20–$75. (843) 545-9622, www.bridge2bridgerun.com