F20-24 at the B.A.A. 10K: Mulatie surges to the top in Boston's heat

• Bosena Mulatie won the F20-24 age group in 31:16 (5:02/mi), posting the fastest women's split on the 5K–8K stretch to seize the lead.
• Sarah Chelangat finished 2nd in 31:27 — just 11 seconds back — with the 3rd-fastest women's closing split from 8K to the finish.
• Jacqueline Gaughan held a steady 3rd, running 33:33 (5:24/mi) and sitting 16th among women from the midpoint through the tape.
• A field of 607 finishers in F20-24 made this one of the day's most competitive age groups, with the top two separated by less than 0.3% of race time.

Eighty-seven degrees, 18 mph wind, and thick June humidity greeted the field in Boston — conditions that turned every minute of racing into a negotiation. Mulatie, 22, came into the 5K–8K segment sitting 3rd among women and left it in 1st, a decisive middle-race surge that was the fastest women's split across that stretch. It was the kind of move that wins races in the heat: go when others are managing, not waiting.

Chelangat, 23, never quite closed the gap Mulatie opened, but she ran a composed race of her own. She held 6th among women from the 5K checkpoint all the way to the finish, and her 3rd-fastest women's closing split signals she still had something left — just not quite enough. The 11-second margin between 1st and 2nd in these conditions is razor-thin, and on a cooler day this one might have gone to the wire.

Gaughan, the local finisher from Boston, locked in at 16th among women and never wavered — 16th at 5K, 16th at 8K, 16th at the finish. That kind of metronomic consistency in oppressive heat is its own achievement, and her 33:33 secured a clear 3rd in the age group. Behind the podium, Tess Reyes and Caroline Howley both moved steadily through the women's field in the final 2K, finishing 4th and 5th in 39:00 and 39:07 respectively — a 7-second gap that reflects how tightly the mid-pack was bunched all the way to Boylston Street.