The Chester County 5k Winter Series is an endurance event held at Downingtown West High School. This series offers five weeks of races, utilizing a USATF certified course known for its speed. Participants are timed using the MyLaps bibtag system, ensuring prompt and accurate results. Awards are based on age-grading, leveling the field for all ages and genders, with prizes sponsored by Bryn Mawr Running Company. Runners completing at least three races are eligible for series awards. Event status updates due to adverse weather are available online, and no refunds are issued for changes or cancellations.