Registration is open for the KRA Spring Marathon Running Program. Kids Running America is an incremental running program designed for kids to train for the 26.2-mile marathon distance over a given time frame, finishing their final mile at the Kaiser Permanente Colfax Marathon on May 14. Registration is $32 and includes the 10- to 12- week program, mileage tracking system on the website, training incentives, entry into the Final Mile Event, race-day goodie bag, Finisher's Medal, T-shirt and certificate of completion. Any school, club or neighborhood team can sign up at kidsrunningamerica.org. Call 303-917-1002 with questions. (Special to The Denver Post)