B.A.A. 10K Women's 20–24: Ari Xie Runs Away With It

• Ari Xie wins the W20–24 group in 53:08 (8:33/mi), more than seven minutes clear of the field in Boston's 85°F heat.
• Xie's 5K–8K stretch was the 3rd-fastest women's split on that segment across the entire women's field — a standout surge in the heart of the race.
• Juniper Mai and Blair Hu both clocked 1:15:03, with Mai edging Hu for 4th by the slimmest of margins — different places, same displayed time.
• Six finishers completed the W20–24 race, spread across a 25-minute window from first to last.

Ari Xie made this one look controlled from the start. The 23-year-old Cambridge runner held 4th among women from the opening checkpoint through the finish line, never wavering in her position and never needing to. Her 53:08 — an 8:33-per-mile clip through Boston's summer heat and humidity — was the class of the W20–24 field by a margin that left little to debate.

What made Xie's performance particularly sharp was what happened between 5K and 8K. While the heat was doing its work on the field, she posted the 3rd-fastest women's split on that segment in the entire women's race — a sign that she wasn't just leading her age group, she was running with the best women on the course at that point in the race.

Lynne Curts of Boston held a steady 8th among women throughout and crossed in 1:00:40 to take 2nd in the group, while Henry Barthelemy rounded out the podium in 1:09:25, picking up the 10th-fastest women's split on the 8K-to-finish segment. The race's tightest moment came just behind: Juniper Mai and Blair Hu both stopped the clock at 1:15:03, but the timing system separated them — Mai takes 4th, Hu 5th, by a margin finer than a second. Katherine Veytsman of Allston closed out the six-woman group in 1:18:28, finishing a tough afternoon on the Boston streets.