Results/Photos

Date: Sept. 27, 2026 Participant: Natalie Sum #30258 Race: 2026 Boulderthon 10K Distance: 6.2 miles

Strong Opening Miles Power a Steady 10K Effort Natalie Sum crossed the finish in 57:24, an overall pace of 9:15 per mile. She opened fast, covering the first three miles in 25:27 roughly 8:29 per mile building a solid cushion before the pace gradually cooled through the middle and closing miles. That opening 5K stretch stood out as the fastest sustained running of her race, with mile two in particular clicking by in 8:12. The final two miles eased into the high 8:00s and low 9:00s as she worked toward the Pearl Street Mall finish, a fitting cap to a day raced at Boulder's altitude of over 5,000 feet. Her steady front-loaded effort reflects smart early pacing, with an option to hold that opening rhythm a bit longer next time.