Results/Photos

Date: Sept. 27, 2026 Participant: Corbyn Robinson #11807 Race: 2026 Boulderthon Marathon Distance: 26.2 miles

Early Speed Sets the Tone for a Steady Endurance Effort Corbyn Robinson completed the marathon in 4:36:38, averaging 10:33 per mile. He opened strong, cutting his cumulative pace from 10:29 to 9:45 over the first five miles, highlighted by a sharp mile 11 split of 9:01. From there, his cumulative pace drifted gradually upward through the second half, settling near 10:34 by the finish as the later miles ran in the 11-minute range before a quicker final mile brought him home. Robinson's fastest sustained stretch came early, miles 2 through 5, where he strung together splits of 9:51, 9:34, 9:27, and 9:30 his most efficient mile-plus segment of the day. That effort came at Boulder's elevation, over 5,000 feet, on a course that winds past the Boulder Reservoir before finishing on the Pearl Street Mall in downtown Boulder.