Run 100 Miles in October

Welcome to the Run 100 Miles in October Challenge! By becoming an American Cancer Society Challenger, you are accepting the challenge to help end cancer as we know it, for everyone. You’re turning your hobbies and passions into support for the American Cancer Society’s work, combating cancer through advocacy, research, and patient support. Together, as Challengers, we can help ensure everyone has an opportunity to prevent, detect, treat, and survive cancer.