For bicycling events in Maryland and its immediate region, contact the following clubs and organizations.

Bicycle Clubs

Annapolis Bicycle Club
Babes on Bikes
Baltimore Bicycling Club
Bikes and Brunch
Chesapeake Wheelmen
Cumberland Valley Cycling Club
DC Velo
Delaware Valley Bicycle Club
Frederick Pedalers
Harford Velo Cycling Club
Lancaster Bicycle Club
Lehigh Valley Velo
Mid–Atlantic Off–Road Enthusiasts
National Capital Velo Club
Oxon Hill Bicycle & Trail Club
Pax Velo Racing Club
Potomac Pedalers Touring Club (PPTC)
Reston Bicycle Club
Richmond Area Bicycling Association (RABA)
Shore Velocity ​
Washington’s Happily Independent Recumbent Lovers (WHIRL)
Western Maryland Wheelmen
White Clay Bicycle Club

Bicycle Organizations

Adventure Cycling Association
Baltimore Metropolitan Council
Bicycle Advocates for Annapolis and Anne Arundel County
Bike Maryland
East Coast Greenway
International Mountain Bicycling Association
League of American Bicyclists
Love to Ride - Central Maryland 
Mid Atlantic Off Road Enthusiasts
Montgomery County Action Group
National Center for Bicycling and Walking
The Bicycle and Trails Advisory Group
Washington Area Bicycle Association (WABA)