Date: Sept. 28, 2025 Participant: John Blackwell #26228 Race: 2025 Boulderthon Half Marathon Distance: 13.1 miles Weather: Perfect running weather with temperatures in the 50's to 70's and nice cloud cover

Pacing Fluctuations Mark the Course John Blackwell completed the 2025 Boulderthon with an official time of 1:50:21. His average pace was 8:25 min/mile. Notably, his performance saw a significant pace variation at mile 4 with a split time of 11:58, which was an outlier compared to his other mile splits. John managed to regain his rhythm with a fastest split of 4:52 at mile 5. Overall, he placed 18th in the M55-59 division, demonstrating competitive consistency. Over the course of 13.1 miles, John maintained a steady pace after mile 5, fluctuating mostly between 8:04 and 8:47 min/mile. Compared to his previous participation in the Boulderthon, his average pace decreased since 2023 and 2024. Focusing on maintaining a steady pace throughout could be advantageous. This might improve his performance in future races. Nonetheless, completing such a large event with consistent effort is commendable, and careful pacing should remain a priority moving forward.