By Gabriella Boston
Special to The Washington Post
Published Aug 21, 2014 at 12:02AM
Maryland Triathlon Series via The Washington Post
Triathlons, endurance events that combine swimming, bicycling and running, are growing rapidly in number and size. The Waterman’s Sprint Triathlon in Rock Hall, Maryland, consists of a 15-mile bike ride through the Eastern Shore countryside, plus a 750-meter swim and a 5K run.