Results/Photos

Date: Sept. 27, 2026 Participant: Sierra Heiser #30523 Race: 2026 Boulderthon 10K Distance: 6.2 miles

Strong Middle Miles Power a Steady 10K Sierra Heiser finished the 10K in 54:37, an overall pace of 8:48 per mile. She opened conservatively at 9:05 for the first mile, then settled into a rhythm through the middle miles, holding between 8:23 and 8:49 from mile two through five before easing to 9:44 over the final mile. Miles three through five stood out as her strongest stretch, clicking off in the 8:238:27 range and pulling her elapsed pace down to 8:37 per mile at the five-mile mark. That effort came at Boulders altitude of over 5,000 feet, a notable backdrop for maintaining that kind of consistency across the middle of the race.