F70-74: Kirkwood owns San Francisco at 72

• Karla Kirkwood won the F70-74 race in 4:57:06 (11:20/mi), climbing from 1,692nd among women at the first checkpoint all the way to 1,248th before the finish.
• Zainab Shamma held second in 5:19:49 (12:12/mi), a gap of 22:43 back — a clear and consistent runner-up performance across all checkpoints.
• Debra Weber rounded out the three-woman field in 6:02:44 (13:50/mi), holding a remarkably steady position among women from the 9.6-mile mark onward.

Three women lined up to race 26.2 miles through San Francisco on a breezy, cool July morning — 59°F with 15 mph winds keeping the hills honest — and Karla Kirkwood, 72, made it look like her city. She entered the women's field ranked 1,692nd at the opening checkpoint and spent the entire race cutting through the pack, reaching 1,248th among women before the final push. Her late-race surge was real: she posted the 798th-fastest women's split on the 22-to-24-mile stretch, a strong kick when most runners are simply trying to survive the final miles.

Zainab Shamma, 71, made the trip from Lewisburg, WV and delivered a composed second-place finish in 5:19:43 — 22 minutes and 43 seconds behind Kirkwood. She moved steadily through the women's field from 1,718th to 1,518th by the 14-to-16-mile segment, where she logged the 986th-fastest women's split, and never ceded her second-place standing in the F70-74 field.

Debra Weber, 70 and racing out of Los Angeles, completed the podium in 6:02:44 at a 13:50/mi pace. What stands out in her data is the consistency: from the 9.6-mile mark through the finish, her position among women barely moved — hovering in the 1,930s the entire way. That kind of steadiness over the back half of a marathon, in a city notorious for its hills and wind, is its own kind of accomplishment. Three starters, three finishers, all of them in their seventies — the F70-74 field delivered every mile.