Join fellow swimmers for a one-mile journey through Boston's beautiful Charles River on Saturday, June 6, 2026, with registration opening at 7:20 am and the race starting at 8 am at The River Dock near the Hatch Shell on Esplanade. You'll swim a looped course between Harvard and Longfellow Bridge with chip timing to monitor your time, and entry is $85 (including a USMS day membership), though current USMS members enjoy a $20 discount. This is the fifteenth running of this classic event, so bring your best effort—there's no rain date, meaning the race goes on rain or shine!