Boston Buildup Winter Series

A series of four progressively longer races. Now in its 49th year, this edition will include modifications to accommodate pandemic restrictions and guidelines. You may register for any of the four individual events or for the full four-race Series. The first 125 Series registrants will receive custom Buildup socks, to be distributed prior to or at the first race.Commemorative long sleeve technical shirts available for purchase for Series or individual race entrants. Please note that while we hope to be able to conduct all the races of the Series as in-person events, the ability to do so is based on permission from the state and towns. While we will make every effort to hold the races in person, including changing the location, the fluctuating nature of the COVID virus makes it possible that some of the races will need to be held as Virtual events. Please read our Refund Policy before registering. FACILITIES: Buildings should be open at all races. Come dressed to run, bring warm clothing for afterwards. Mile & 5km splits marked (every km in 10K). Digital clock at finish. ChronoTrack B-Tag timing (gun times, net times where possible.). POSTPONEMENTS: Postponed races will be held …