Chicago 13.1 — F40-44: Birth-Davis holds off Sullivan in a sub-1:25 showdown

• Carrie Birth-Davis won the F40-44 group in 1:24:04 (6:25/mi), posting the 12th-fastest women's split on the 15K-to-finish stretch to seal the victory.
• Jeannie Sullivan was just 28 seconds back at 1:24:32 (6:27/mi), running the 15th-fastest women's split on the second half — a strong close that nearly caught Birth-Davis.
• Hidi Gaff rounded out the podium in 1:27:47, more than three minutes clear of 4th — the gap between 3rd and 4th was larger than the gap between 1st and 3rd.
• A tight cluster at 7:24/mi: Joann Marinkovich (7th, 1:36:56) and Linda Frederick (8th, 1:37:02) were separated by just six seconds, with Mirabela Kouinis (9th, 1:37:07) only five seconds further back.

The F40-44 race at Chicago 13.1 was decided at the front by two 40-year-olds running at a pace most runners half their age would envy. Carrie Birth-Davis of Fayetteville, NC led a fluid chase through the women's field, moving between 14th and 16th among all women before locking into 14th at the line — a testament to a well-managed effort across 13.1 miles in 74°F heat and a 12 mph wind. Her 6:25/mi average was the class of the age group.

Jeannie Sullivan of Clarendon Hills, IL made things interesting. She was actually running slightly ahead of Birth-Davis in the women's field through the middle miles — sitting as high as 16th among women at the halfway point — and her 15th-fastest women's split on the second half shows she didn't fade. She simply ran out of course, crossing in 1:24:32. Twenty-eight seconds is a decisive margin, but Sullivan's finish was anything but a collapse; she earned every inch of that podium.

Hidi Gaff of Fort Wayne, IN claimed 3rd in 1:27:47, though her gender place drifted from 17th to 25th across the race, suggesting the back half cost her a little. Sara Winslow (4th, 1:29:46) and Jenn Splinter (5th, 1:34:05) rounded out the top five, with Splinter holding a remarkably consistent position — 46th among women — at every checkpoint before the finish. Among the deeper field of 208 finishers, Ratna Hendrianto and Erin Ding both clocked 1:41:23 for 11th and 12th respectively, with the official places confirming Hendrianto edged across the line first.