Results/Photos

Date: Sept. 27, 2026 Participant: Anna Mackey #13112 Race: 2026 Boulderthon Marathon Distance: 26.2 miles

Steady Pacing Through 20 Miles, Strong Closing Kick Anna Mackey completed the Boulderthon Marathon in 4:20:35, an average pace of 9:56 per mile. Her race held remarkably even through the first 20 miles, with cumulative pace tightening from 9:24 at mile 1 to 9:43 at mile 20, before the marathon's later miles pushed her overall pace toward 9:57 by the finish. Miles 6 through 11 stood out as her most consistent mile-plus stretch, holding between 9:22 and 9:51 per mile as she settled into rhythm. After a tougher patch from miles 2124, where pace slipped into the 10:4611:25 range, Mackey rallied over the final two miles, closing with a 9:22 split into downtown Boulder a strong finish given the marathon's net elevation gain and Boulder's altitude above 5,000 feet.