All American Bicycle Club Antietam Velo Club Artemis Racing Club Babes On Bikes Baltimore Bicycle Club Charm City Cycling Chesapeake Wheelmen Cycling Made Fun Cumberland Valley Cycling Club D.C. Velo Club Evolution Cycling Club Frederick Pedalers Bicycle Club Granny Gear Productions MABRA (Mid-Atlantic Racing Association) National Capital Velo Club Oxon Hill Bicycle & Trail Club Patuxent Velo Potomac Pedalers Touring Club Potomac Velo Club Reston Bike Club Richmond Area Bicycling Association Route 1 Velo Squadra Coppi Team-In-Training Annapolis Bicycle Racing Team WHIRL (Washington's Happily Independent Recumbent Lovers) White Clay Bicycle Club Whole Wheel Velo Club Winchester Wheelmen
Baltimore Area Triathlon Club Bonzai Sports Capital Area Triathlon Club ClayBritt Swimming D.C. Triathlon Club Fitness Concepts Frederick Triathlon Club Mid Maryland Triathlon Club National Triathlon Academy Reston Area Triathletes Richmond Triathlon Club Team-In-Training Tri It Now TriSpeed Multisports
One Less Car Baltimore Department of Parks & Recreation Gwynns Falls Hiking and Biking Trail Velocipede Bike Project Friends of Patterson Park, Inc. Jones Falls Watershed Association The Northern Central Rail Trail The Baltimore Annapolis Rail Trail Baltimore Spokes BikeJam Bicycle Helmet Safety Institute East Coast Greenway National Center for Biking and Walking Washington Area Bicycle Association The Rails-to-Trails Conservancy