Results/Photos

Date: Sept. 27, 2026 Participant: Riley Irwin #23388 Race: 2026 Boulderthon Half Marathon Distance: 13.1 miles

Steady Pacing Gives Way to a Strong Closing Kick Riley Irwin covered the half marathon in 1:39:26, an average pace of 7:35 per mile. Her opening ten miles were remarkably even, holding between 7:31 and 7:39 per mile despite a brief dip to 8:04 at mile 8. From there she rallied, closing miles 12 and 13 in 7:23 and 7:17her fastest two-mile stretch of the raceto finish with real momentum through downtown Boulder. That late surge came as she passed through the lululemon Power-Up Zone near mile 9.5, having already logged a mile in the 7:20s shortly after. Considering Boulders elevation above 5,000 feet, sustaining that kind of pace late in the race speaks well of her conditioning and pacing discipline.