Kari Ebeling, race director of Sunday's Iron Girl Half Marathon and Coed 5K, said there will be a moment of silence before the start "to honor all those individuals affected by the bombing in Boston."

Ebeling, who also is the chief operating officer of the nonprofit TriColumbia, which hosts the event, complimented the work of the Howard County Police and added that "we are following their recommendations for any added precautions."

Mary T. Phelan, a spokeswoman for the police department, could not comment on what, if any, added security measures the department is taking in light of the bombings at the Boston Marathon.

She did say, however, that "there will be a significant police presence at Iron Girl this weekend."

Ebeling said she expects approximately 1,700 runners to participate in the Half Marathon and 400 in the Coed 5K.

Part of Little Patuxent Parkway in downtown Columbia, from Sterrett Place to South Entrance Road, will be closed when the Half Marathon begins at 7 a.m.

Runners will gather at a parking lot adjacent to the Sheraton Columbia Town Center Hotel. From there, they will head west on Little Patuxent to Cedar Lane, go left onto Cedar Lane, left on Hickory Ridge, right onto Sunny Spring, right at Bright Plume, right on Sunny Spring, left onto Owen Brown Road, left onto Llanfair Drive, right onto Debon Drive, right onto Wooded Run Drive, left onto Owen Brown, right onto Martin Road, right onto Cedar Lane, left onto Harmel Drive, right onto Watch Chain Way, left onto Hickory Ridge Road and right onto Little Patuxent Parkway.