Date: Sept. 28, 2025 Participant: Boris He #24153 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

Steady Start, Variable Splits Boris demonstrated a consistent effort throughout the 2025 Boulderthon Half Marathon with an overall finish time of 1:51:01, averaging an 8:28-minute mile pace. Commencing at a brisk 7:31-minute mile, he transitioned through splits showing some variability. Notably, he maintained a strong pace closest to his initial speed during the 5th mile with a 7:59-minute mile, showing his ability to recover pace efficiently amidst the increasing distance. In examining his progression, the initial two splits show impressive placement within M20-24 division, maintaining top positions of 33rd and 39th. As the race progressed, his placement fluctuated but still saw recovery at the 5-mile and 9-mile marks. Boris could explore strategies to sustain his early pace in later stages, focusing on endurance for improved consistency. The performance highlights his potential and provides an analytical foundation for future races.