Results/Photos

Date: Sept. 27, 2026 Participant: Jonas Swanson #11236 Race: 2026 Boulderthon Marathon Distance: 26.2 miles

Steady Pacing Powers a Strong Marathon Finish Jonas Swanson completed the marathon in 4:04:28, averaging 9:19 per mile across the 26.2-mile course. He opened briskly with a 9:02 first mile, settled into the mid-9:20s through the middle miles, and held that rhythm all the way to the final mile, finishing almost exactly where his pace began. His best stretch came from miles 9 through 11, where he ran 9:12, 9:01, and 8:31 his fastest three-mile run of the day before the pace leveled back out for the remainder of the race. Racing at Boulders elevation of more than 5,000 feet, Swansons consistency held firm to the finish, closing out his marathon on the historic Pearl Street Mall in downtown Boulder.