Waltham Dash N Splash 5K

YMCA of Greater Boston presents the 5K Race Series! Challenge yourself and accomplish your race goals with the YMCA of Greater Boston 5K Race Series. Our 5K races are the perfect motivation to keep you on course to health & wellness. Our goal is to provide you with a fun and high-quality race experience you’d only expect from the YMCA of Greater Boston. Register for a single race or our full Race Series!