Results/Photos

Date: Sept. 27, 2026 Participant: Karina Arnold #32426 Race: 2026 Boulderthon 5K Distance: 3.1 miles

Strong Middle Mile Powers a Steady 5K Finish Karina Arnold covered the 5K in 27:52, an 8:59/mile pace. Her race built in the middle: a 9:37 opening mile eased into a swift 7:26 second mile, the fastest stretch of her day, before settling back to 9:48 for the close. That surge through mile two reshaped her overall pace and carried her through the second half of the course with strong momentum. Boulder's elevation sits above 5,000 feet, a backdrop worth noting for any effort at this altitude. Arnold's ability to produce a sub-7:30 mile amid that thinner air stands out as the highlight of her run, even as the final mile settled back toward her starting rhythm.