Sunday: Passaic County Runners' Club Winter Series, 5K and 5-mile, Wayne, N.J. Register by 11:59 p.m. Dec. 28 at: http://www.pcrcnj.blogspot.com/
Sunday: Kris Kringle Run, 5-mile, Leesport, Pa. Register on site. More information at: http://www.pagodapacers.com/races/
Dec. 31: New Year's Eve Midnight Run, 5K, Philadelphia, Pa. Register by 11:59 p.m. Dec. 29 at: http://www.runbucks.com/id12.html.
Dec. 31: Upper Main Line YMCA New Year's Eve 5k, Berwyn. Register on site. More information at: http://www.umly.org/branch/berwyn/assets/Forms/5k/default.asp.
Dec. 31: Race Into the New Year, 5K and 1/4-mile youth run, Rehoboth, Del. Register on site. Details at: http://www.seashorestriders.com/content/
Every Sunday through Feb. 24: Browning Ross Winter Series, Glassboro 5K. Register day of race only. For information, go to: tuffgangrunning.com.
If you have an upcoming race to include in the weekly calendar, e-mail email@example.com.