How about working off that turkey...before you eat it! The Turkey Trot Los Angeles takes participants on a scenic course through Downtown LA, (starting and ending near City Hall/ Grand Park).
Participants can run or walk (or push a stroller) on either a 5 or 10K course. A post event festival is held in front of City Hall starting at 8am.
Kids ages 5 to 17 can participate in the 5k or 10k run/walks. The Widdle Waddle is a 1K family/kid walk or run (for kids 2 - 12).
See website for various registration fees.