Results/Photos

Date: Sept. 27, 2026 Participant: Natalie Mack #10311 Race: 2026 Boulderthon Marathon Distance: 26.2 miles

Strong Front Half Fuels a Hard-Earned Marathon Finish Natalie Mack completed the marathon in 4:14:49. Her race was defined by two distinct halves: through 13 miles she was clipping along near 8:008:20 per mile, reaching the midpoint in 1:48:04. From there, pace eased steadily, with mile 18 slowing to 14:11 before settling into a 9:3012:00 rhythm over the closing miles to the finish. Her opening 13 miles stand out as the strongest stretch of the day, holding sub-8:20 pace mile after mile before the second half's gradual fade. That early consistency came at altitude, in a city sitting over 5,000 feet, on a course that runs out past Boulder Reservoir before finishing on the Pearl Street Mall in downtown Boulder.