The Philadelphia Bike-A-Thon Virtual Experience is available to the 2023 Participants that have already registered for the 2023 Philadelphia Bike-A-Thon as a "Virtual Participant" at www.acsbike.org. RunSignUp will be used to track your mileage throughout the experience. Each of us have reasons for riding, share yours by printing and wearing this I'm RIDING For bib as you ride.