Results/Photos

Date: Sept. 27, 2026 Participant: Izaac Stone #11211 Race: 2026 Boulderthon Marathon Distance: 26.2 miles

Fastest Boulderthon Yet, Building Toward Faster Splits Izaac Stone crossed the marathon finish in 4:07:50, a sizable improvement over his 4:37:13 in 2024 and 4:33:07 in 2025. His overall pace held steady near 9:15-9:27 per mile through most of the race, with cumulative pace tightening through the middle miles before drifting slightly in the closing stretch. His strongest running came from miles 9 through 11, where he clicked off three miles in roughly 8:50 per mile, the fastest sustained stretch of his day. Racing at Boulder's altitude of over 5,000 feet, Stone's steady effort reflects continued progress on this course, shaving nearly 30 minutes off last year's finish.